Le 31
Washable Monochrome Pant London Fit - Slim Straight
This is a pair of men's dress pants from the Le 31 by Simons brand, featuring a London fit with a slim-straight silhouette from thigh to ankle. They are made from a stretch fabric blend of viscose and reprocessed polyester, making them machine washable and easy care for travel. Key features include a flat front, belt loops, side pockets, back welt pockets, and an unfinished hem for tailoring.
Color
Size
Specifications
- Material
- Leg Lining: 100% polyester
- Gender
- male
- Age Group
- adult
- Condition
- new
Product Insights
The Washable Monochrome Pant by Le 31 is a machine-washable tailored pant in a slim straight London fit, priced at $125. It combines a soft, fluid viscose-blend fabric with a smooth hand and 30-minute wrinkle recovery, making it ideal for travel. The pants are sold with an unfinished hem for customizable break style, pair with a matching jacket for a travel suit, and feature a leg lining for easy dressing. Main tradeoffs: machine washing saves dry-cleaning costs but requires air drying to prevent shrinkage, and breathability is less than cotton or linen.
- Fit comparison
Narrower than Berlin fit, more relaxed than Stockholm fit.
Why this is supported
The London fit is positioned between Le 31's other fits: it is
narrower than the Berlin fit (straight with regular thigh fit)
How does the London fit (slim straight) compare to Le 31’s other fits like the 'slim' or 'straight' in terms of thigh and leg opening measurements?and
more relaxed than the Stockholm fit (slim from thigh to ankle)
How does the London fit (slim straight) compare to Le 31’s other fits like the 'slim' or 'straight' in terms of thigh and leg opening measurements?. Le 31 does not publish exact measurement charts, so these comparative descriptions are the primary guide for buyers.
- Hem customization
Unfinished hem allows choice of break style.
Why this is supported
The pants have an unfinished hem, enabling the buyer to choose a break style. For instance,
No-break pants stop right above the shoe with almost zero fabric folding.
grammartrends.comThis allows the silhouette to be fine-tuned during hemming.
- Travel suit
Pairs with matching jacket for a machine-washable suit.
Why this is supported
The London fit pants are designed to pair with the matching jacket, as
The matching jacket creates a full machine-washable suit that can be worn together for business or split into separates
How these pants perform during travel — matching_jacket_suit_system, offering versatility for travel.
- Drape and hand feel
Viscose-blend fabric has a soft, fluid drape and smooth, non-plasticky hand.
Why this is supported
The viscose blend provides a soft, fluid drape and smooth hand.
In finished clothing, viscose is usually fluid, smooth, cool against the skin, and more elevated than many basic cottons or polyesters.
arcusag.comThis sets it apart from all-polyester travel pants like Quince's Technical Dress Pant (material:
Material: 52% recycled polyester 48% polyester
quince.com). The soft drape elevates these trousers beyond typical travel pants, allowing them to double as tailored slacks.
- Wrinkle recovery
Sheds packing folds in 30 minutes and recovers from bagging faster than wool.
Why this is supported
The polyester component counteracts viscose's tendency to bag and crease.
After an 8-hour working day, TR suit trousers recover from knee and seat creases significantly faster than both pure cotton and pure wool alternatives.
fuxing-tex.comAdditionally,
High-count TR fabrics (such as 150S or 160S blends) can shed 24-hour fold marks within 30 minutes of hanging — no ironing required before heading out.
fuxing-tex.comThis combination makes these pants ideal for packing.
- Breathability
Breathability is better than all-polyester but less than cotton or linen.
Why this is supported
The viscose content improves breathability over pure polyester, reducing clamminess. However,
Breathability is not the same as cotton or linen: Viscose helps, but the blend may still feel warm depending on weight and weave.
arcusag.comSo these trousers are best suited for climate-controlled settings.
- Travel versatility
Matching jacket, leg lining, versatile fit, and unfinished hem optimize travel use.
Why this is supported
Matching jacket can be worn as suit or separates; unfinished hem allows free in-store custom length; London fit adapts to business or casual. Leg lining
reduces friction and prevents the outer fabric from catching
Is the leg lining 100% polyester intended for easy wear over dress shoes or does it add warmth?making on/off easy during travel.
- Care
Machine washable saves $15–40 dry-cleaning costs; air drying prevents shrinkage.
Why this is supported
Pants can be
machine-washed at 30°C on a gentle cycle
fuxing-tex.com, saving the typical
dry-cleaning session for a wool suit typically costs $15–40
fuxing-tex.com. But the viscose content means
.
- Cost savings
At $125, these pants cost less than Le 31's wool trousers and incur no dry-cleaning costs.
Why this is supported
These pants are machine washable, eliminating the $15–40 per visit dry-cleaning cost of wool trousers.
Most TR suits can be machine-washed at 30°C on a gentle cycle, while a single dry-cleaning session for a wool suit typically costs $15–40 in most markets.
fuxing-tex.comSimons provides free in-store hemming that saves $10–20 on alterations. At $125, the pants are half the price of Le 31's $250 wool trousers, so the combined savings make them significantly more economical over time. Air drying is recommended to prevent shrinkage but adds no cost.
Le 31 offers this pant at CAD 125, a mid-point between its $99 solid twill and $250 wool-blend lines. The machine-washable construction eliminates dry-cleaning costs, as documented by a textile source:
Simons also provides
*Free hemming service in store
stylight.ca, saving $10–20 per pair compared to outside tailoring.
- Fabric
Viscose blend yields soft drape, 30-min crease recovery, and better breathability.
Why this is supported
The main fabric is a viscose/reprocessed polyester blend, described as
Stretch fabric in a viscose and reprocessed polyester blend
stylight.ca. Compared to all-polyester trousers, this blend delivers a softer hand. Viscose contributes a fluid, smooth drape and cool feel, as noted:
In finished clothing, viscose is usually fluid, smooth, cool against the skin, and more elevated than many basic cottons or polyesters.
arcusag.comThe polyester content enables crease recovery;
High-count TR fabrics (such as 150S or 160S blends) can shed 24-hour fold marks within 30 minutes of hanging — no ironing required before heading out.
fuxing-tex.comBreathability improves over all-polyester but still trails cotton or linen:
Breathability is not the same as cotton or linen: Viscose helps, but the blend may still feel warm depending on weight and weave.
arcusag.com- Exclusivity
Exclusive Simons house brand; unfinished hems and matching jacket make a tailored travel suit.
Why this is supported
Le 31 is a Simons house brand, as stated:
Le 31 by Simons: an exclusive designed in Canada
stylight.ca. The unfinished hems are a tailoring cue found in suit pants, and the matching jacket reinforces the suit intent:
You’ll often see unhemmed trousers in: - Suit pants - Luxury menswear - Formal trousers
grammartrends.comand
Matching jacket also available
stylight.ca- Travel convenience
Matching jacket, leg lining, and unfinished hem suit travel and fit.
Why this is supported
Paired with the matching jacket, these pants form a machine-washable suit ideal for travel. The leg lining is intended to ease wear over dress shoes:
The leg lining (100% polyester) is intended to help the pants slide on and off easily over dress shoes, not primarily for warmth.
Is the leg lining 100% polyester intended for easy wear over dress shoes or does it add warmth?The unfinished hem allows custom break—such as no-break or slight break—as described:
No-break pants stop right above the shoe with almost zero fabric folding.
grammartrends.comand
A slight break creates one small fold where the pant meets the shoe.
grammartrends.com- Suit system
Matching jacket lets pants serve as a full suit or separates, reducing carry-on bulk.
Why this is supported
The matching jacket creates a full machine-washable suit that can be worn together or as separates, doubling travel outfit combinations from a single packing unit while eliminating the need for a dry-clean-only wool suit and saving
a single dry-cleaning session for a wool suit typically costs $15–40 in most markets
fuxing-tex.comin conventional upkeep. The unfinished hem and free in-store hemming allow precise tailoring for a polished suit appearance, as the brand signals this pant's tailored nature by offering a matching jacket and leaving the hem unfinished:
Unfinished hems are a hallmark of suit trousers because they enable a precise fit impossible with pre‑hemmed pants; Le 31's choice to ship this machine‑washable pant unhemmed — and to offer a matching jacket — signals that the brand sees it as a versatile tailored piece, not just a casual stretch pant
Unfinished hem and the free in‑store hemming service — unfinished_hem_as_a_tailoring_cue- Crease recovery
Recovers from fold marks within 30 minutes; maintains pressed crease through the day.
Why this is supported
The fabric’s viscose-polyester blend provides elastic recovery and shape memory, which research confirms enables the trousers to shed deep fold marks within 30 minutes of hanging and maintain their pressed crease through extended wear.
After an 8-hour working day, TR suit trousers recover from knee and seat creases significantly faster than both pure cotton and pure wool alternatives.
fuxing-tex.comThis performance extends to packing and travel, as the pants emerge from luggage with fewer hard lines than pure viscose trousers.
The polyester content compensates for viscose’s notorious tendency to crease by providing elastic recovery and shape memory
How these pants perform during travel — viscose_polyester_wrinkle_recoveryCorroborated by multiple sources, the material’s molecular structure prevents permanent knee bagging and ensures the slim-straight silhouette stays crisp.
- Hem break
Choose from no-break, slight-break, or medium-break hem.
Why this is supported
The pants ship with an unfinished hem, allowing buyers to customize the break. According to grammartrends.com,
No-break pants stop right above the shoe with almost zero fabric folding.
grammartrends.com,
A slight break creates one small fold where the pant meets the shoe.
grammartrends.com, and
Medium-break trousers create noticeable folds over the shoe.
grammartrends.com. This range lets the wearer adjust formality from a sharp modern line (no-break) to a traditional drape (medium-break).
- Hemming
In-store hemming is free; online buyers pay $10–20 for a tailor.
Why this is supported
The product listing states
*Free hemming service in store
stylight.ca. A value comparison notes that this
. However, since the free service is only available in-store, online buyers need to pay a tailor $10–20.
- Leg lining
Polyester leg lining reduces friction for easy dressing over dress shoes.
Why this is supported
The leg lining's purpose is confirmed by a product Q&A response, which states that
This confirms that the lining serves as a friction-reducing feature for easy dressing over dress shoes, not for added warmth. The pants also feature an unfinished hem, which allows buyers to customize the length and break over dress shoes—a combination that elevates the convenience of these machine-washable trousers.
Image Analysis
3 images- 01
Product
Front view of a pair of slim straight navy dress pants worn by a male model; visible waistband with black belt, trouser front seams and pressed crease, and full-length legs finishing above black leather dress shoes. Model wears a short-sleeve cream henley tucked into the pants.
- Pants silhouette and fitFront-facing slim straight trousers with a mid-to-high waist, flat front, and a visible center front crease running down each leg.
1 region
x 0.31 · y 0.36 · w 0.38 · h 0.52 (high) - Waistband and beltNarrow black belt threaded through the pants waistband with a rectangular metallic buckle centered at the front.
1 region
x 0.33 · y 0.43 · w 0.34 · h 0.05 (high) - Fabric appearanceSmooth woven fabric with a matte finish and subtle tailoring creases visible on the thigh and knee areas.
1 region
x 0.31 · y 0.38 · w 0.38 · h 0.48 (medium) - Pocket and fly areaFront fly seam visible; side pocket openings implied by slight shaping at the hips but pocket openings are not prominent.
1 region
x 0.31 · y 0.41 · w 0.30 · h 0.18 (medium) - Lower leg and hemStraight hem finishing close to the top of the shoes with slight fabric break at the front of the ankles.
1 region
x 0.32 · y 0.78 · w 0.36 · h 0.16 (high) - Visible garment above pantsShort-sleeve cream henley shirt tucked into the waistband, with a three-button henley placket visible on the chest.
1 region
x 0.20 · y 0.06 · w 0.60 · h 0.36 (high) - Shoes visible as part of outfitPolished black leather dress shoes with rounded toe and low heel visible at the bottom of the frame.
1 region
x 0.30 · y 0.82 · w 0.40 · h 0.12 (high)
Other
Studio full-body front shot of a male model against a plain light background with soft even lighting and minimal shadowing on the floor.
- Shot compositionFull-body portrait framing from slightly above floor level showing the model centered in the image.
- Background and settingUniform light gray to off-white seamless studio background with a faint horizontal floor-to-wall seam near the model's feet.
1 region
x 0.00 · y 0.84 · w 1.00 · h 0.16 (high) - Model poseModel stands facing the camera with hands positioned behind the back and legs slightly apart.
- Lighting and shadowsSoft, even studio lighting with a subtle shadow beneath and slightly behind the shoes on the floor.
1 region
x 0.28 · y 0.88 · w 0.44 · h 0.06 (medium) - Image croppingTop of the model's head is fully visible but close to the upper edge of the frame; full feet included with slight floor margin.
Colors
navy blue· pants#242B42black· belt#0E1324black· shoes#0E0E0Dcream· shirt#CAC6C2- Pants silhouette and fitFront-facing slim straight trousers with a mid-to-high waist, flat front, and a visible center front crease running down each leg.
- 02
Product
Front view of a pair of dark navy flat-front dress pants shown on a model from waist to shoes, slim-straight silhouette with center creases and belt loops.
- Overall silhouetteSlim-straight tapered trousers shown on a model from the natural waist to the shoes, with a straight leg line and slight taper toward the ankle.
1 region
x 0.15 · y 0.14 · w 0.70 · h 0.76 (high) - Waistband and belt loopsStructured waistband with evenly spaced belt loops visible at front and sides; waistband sits at the model's natural waist.
1 region
x 0.22 · y 0.14 · w 0.56 · h 0.08 (high) - Front closureConcealed front fly closure with no visible buttons or zipper teeth; center front seam aligns with the fly.
1 region
x 0.40 · y 0.18 · w 0.20 · h 0.12 (high) - Front creasePressed vertical crease running down the center of each pant leg from hip to hem.
2 regions
x 0.28 · y 0.20 · w 0.12 · h 0.66 (high); x 0.58 · y 0.20 · w 0.12 · h 0.66 (high) - Side pocketsSlightly angled side seam pocket openings visible at upper hips on both sides.
2 regions
x 0.18 · y 0.25 · w 0.16 · h 0.12 (high); x 0.66 · y 0.25 · w 0.14 · h 0.12 (high) - Fabric appearanceSmooth woven fabric with a slight matte-to-satin finish and minimal visible texture.
1 region
x 0.30 · y 0.24 · w 0.40 · h 0.58 (high) - Hem and fit at ankleClean finished hem that falls to the top of the shoes, with a small break at the front of the ankles.
1 region
x 0.30 · y 0.76 · w 0.40 · h 0.18 (high) - Visible creasing at kneeMinor horizontal crease lines visible at the front of the knees from natural bend.
1 region
x 0.40 · y 0.46 · w 0.20 · h 0.10 (high)
Other
Studio product shot showing model wearing the pants against a plain light gray background; black dress shoes and model hands are visible; even soft lighting with subtle shadows under shoes.
- Background and stagingPlain light gray studio background with a smooth floor surface and no props.
- Model elements visibleLower torso and legs of a model are shown; portions of the model's hands are visible at the sides and a white shirt hem is visible at the waist.
1 region
x 0.10 · y 0.02 · w 0.80 · h 0.20 (high) - Footwear visibleBlack polished leather dress shoes with laces visible on the model's feet.
1 region
x 0.32 · y 0.84 · w 0.34 · h 0.14 (high) - Lighting and shadowsEven soft studio lighting from front with subtle soft shadow cast beneath shoes and along inner leg seams.
Colors
dark navy· pant fabric#242B43- Overall silhouetteSlim-straight tapered trousers shown on a model from the natural waist to the shoes, with a straight leg line and slight taper toward the ankle.
- 03
Product
Rear view of a pair of slim-straight tailored pants in a dark navy color; visible waistband with belt loops, two buttoned welt back pockets, pressed creases down the legs, and straight hems falling over dress shoes.
- View and poseRear view of pants worn by a model with the waistband visible and the legs extending fully to the shoes; model's hands are visible at the sides and a tucked white shirt is partially visible at the top of the waistband.
1 region
x 0.12 · y 0.04 · w 0.76 · h 0.92 (high) - Waistband and belt loopsStraight waistband with evenly spaced belt loops visible across the rear; waistband aligns with the top of the back pockets.
1 region
x 0.22 · y 0.08 · w 0.56 · h 0.08 (high) - Back pocketsTwo horizontal welt back pockets with a single dark button on each pocket; pocket welts are narrow and sit symmetrically on either side of the center back.
2 regions
x 0.28 · y 0.14 · w 0.16 · h 0.06 (high); x 0.56 · y 0.14 · w 0.16 · h 0.06 (high) - Buttons on pocketsSmall round dark buttons securing each back pocket; buttons appear to be sewn through a single hole area and are darker than the pant fabric.
2 regions
x 0.30 · y 0.15 · w 0.04 · h 0.04 (high); x 0.64 · y 0.15 · w 0.04 · h 0.04 (high) - Front side pockets (partial)Slightly visible diagonal openings of side pockets on each hip just below the waistband, seen from the rear angle.Partial
2 regions
x 0.18 · y 0.18 · w 0.10 · h 0.12 (medium); x 0.72 · y 0.18 · w 0.10 · h 0.12 (medium) - Center back seam and leg creasesVisible pressed creases run down the center of each pant leg from the seat to the hem; the center back seam at the waist is subtle.
1 region
x 0.36 · y 0.20 · w 0.28 · h 0.70 (high) - Fabric appearanceSmooth, tightly woven fabric with a matte finish and minimal visible texture; fabric drapes straight with light natural folds behind the knees.
1 region
x 0.20 · y 0.16 · w 0.60 · h 0.70 (high) - Hem and fit at ankleStraight hems that fall to cover the tops of the dress shoes, creating a slim-straight silhouette through the leg.
1 region
x 0.26 · y 0.76 · w 0.48 · h 0.20 (high)
Other
Studio product shot with a plain light grey background; even soft lighting with minimal shadowing; image is vertically centered and cropped slightly above the waist and at the soles of the shoes.
- Background and lightingUniform light grey background with even studio lighting producing soft, diffuse shadows under the shoes.
- Props and stagingModel wearing black polished dress shoes and a tucked white top; only the lower legs, shoes, hands, and part of the tucked shirt are visible to frame the pants.
2 regions
x 0.34 · y 0.82 · w 0.32 · h 0.12 (high); x 0.36 · y 0.00 · w 0.28 · h 0.10 (high) - Shot compositionCentered vertical composition showing full rear leg length; image cropped slightly at top of the waistband and just below the shoe soles.
Colors
dark navy· main fabric (pants)#242B42black· back pocket buttons#0B0E1E- View and poseRear view of pants worn by a model with the waistband visible and the legs extending fully to the shoes; model's hands are visible at the sides and a tucked white shirt is partially visible at the top of the waistband.
Documents & Data
Customer Reviews
9 total9 reviews · out of 5
Pant
Nice, but drab
Taille commençant à 30.
Pas de grandeur en deçà de 30 donc trop grand !
Belle qualite
Content d’avoir trouvé!
nice pants
great fit. i probably won't hem them or at least hem myself if i do as when i have them professionally hemmed they get a smidge too short. but i can't find many pants that fit period so i'm very pleased.
Parfait!
Parfait!
Problème de pointure
Sur quatre pantalons commandés, tous étaient de taille 36. Deux, dont celui-ci, ne pouvaient pas être boutonnés à la taille tellement ils étaient petits. Les deux autres attachent parfaitement. À mon avis, il s'agit là d'un problème majeur.
Belle qualité du matériel, belle
Belle qualité du matériel, belle coupe de pantalon. Oui je le recommande.
Un classique
Belle teinte de marine. Coupe droite, pas trop ajustée. Taille conforme
B
B