
Le 31 x Thomas Mason
Brown-Stripe Poplin Shirt An Exclusive Collaboration Made In Canada Standard Fit
This is a long-sleeve, button-front poplin shirt in a brown-and-white vertical stripe, with a medium spread collar, center placket, and barrel cuffs. It is made in Canada from 100% cotton woven poplin under the Le 31 by Simons label using Thomas Mason fabric, in a standard fit that is straight through the waist and shoulders with regular-fit sleeves. The shirt uses genuine Madagascan mother-of-pearl buttons; because the buttons are delicate, the garment should not be put in the dryer.
- Color
- Brown-Stripe
- Material
- 100% cotton weave
- Gender
- male
- Style
- classic, smart-casual, business, preppy
- Category
- Apparel & Accessories > Clothing > Shirts & Tops
Color
Specifications
Exclusive Le 31 by Simons standard-fit poplin shirt in brown stripes, made in Canada from 100% cotton with genuine mother-of-pearl buttons.
Standard fit with straight waist and shoulders; regular-fit sleeves; structured brown stripes; soft poplin handfeel; genuine Madagascan mother-of-pearl buttons; made in Canada.
- Color
- Brown-Stripe · brown
- Material
- 100% cotton weave
- Style
- classic, smart-casual, business, preppy
- Occasion
- work, business-casual, interview, everyday
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Shirts & Tops
Additional Attributes
- standard fit with a straight silhouette at the waist and shoulders
- regular-fit sleeves
- brown striped poplin weave
- bright, structured stripe pattern
- soft and consistent fabric handfeel
- 100% cotton construction
- made in Canada
- exclusive Le 31 by Simons design
- genuine Madagascan mother-of-pearl buttons
- delicate buttons; garment should not be tumble dried
- Downing poplin fabric
- balance of strength and sophistication
- button-front shirt
Product Insights
Exclusive Le 31 x Thomas Mason men's shirt made in Canada 100% cotton poplin Standard fit with straight waist and shoulders, regular-fit sleeves Genuine Madagascan mother-of-pearl buttons; delicate and no spares listed Do not tumble dry; heat and tumbling damage the mother-of-pearl buttons Premium price and delicate care offset by fabric and finish
Verified claims
- Identity
- Exclusive Le 31 x Thomas Mason men's shirt made in Canada
- Material
- 100% cotton poplin
- Fabric
- Downing poplin with bright, structured monochromatic stripes
- Pattern
- Patterned Brown vertical stripe in medium brown, white and dark accent lines
- Fit
- Standard fit with straight waist and shoulders, regular-fit sleeves
- Sizing
- Sizes 145 through 180, eight variants, all Patterned Brown
- Between sizes
- All sizes are in stock at one price, so adjacent sizes can be compared
- Sizing method
- Measure collar, chest, sleeve, waist and hips to map to size
- Comfort
- Lightweight, breathable and cool for warm weather
- Fabric behaviour
- Cotton poplin wrinkles and can shrink, especially with hot washing
- Hand feel
- Soft, consistent poplin with a smooth, slightly sheened surface and crisp drape
- Buttons
- Genuine Madagascan mother-of-pearl buttons; delicate and no spares listed
- Care - dryer
- Do not tumble dry; heat and tumbling damage the mother-of-pearl buttons
- Care - wash
- Machine wash cold on delicate; do not bleach; professional cleaning is an option
- Care - iron
- Iron with or without steam, pressing around the buttons
- Construction
- Spread collar, centre placket, two-button barrel cuffs and sewn labels
- Styling
- Defined vertical stripe and spread collar dress up or down; tucks cleanly
- Occasions
- Work-appropriate warm-weather shirt for business casual and smart settings
- Value
- 375 CAD buys Thomas Mason fabric, Canadian sewing and mother-of-pearl buttons
- Tradeoff
- Premium price and delicate care offset by fabric and finish
- Comparison
- Downing poplin offers defined stripes and a crisp hand versus generic poplin
Product record
- Title
- Brown-Stripe Poplin Shirt An Exclusive Collaboration Made In Canada Standard Fit
- Brand
- Le 31 x Thomas Mason
- Price
- 375 CAD
- Availability
- In stock
Image Analysis
2 images- 01

Product
Front view of a long-sleeve, vertically striped button-up shirt worn tucked into trousers; visible features include spread collar, white buttons, and barrel cuffs.
- Overall silhouetteVisible front view of a long-sleeve, button-front shirt with a straight hem tucked into trousers; shirt shows chest, sleeves, and collar area.
1 region
x 0.08 · y 0.12 · w 0.84 · h 0.68 (high) - Collar styleMedium-width spread collar with visible collar points resting flat against the chest.
1 region
x 0.38 · y 0.10 · w 0.24 · h 0.12 (high) - Placket and buttonsCenter front placket with a single column of visible round white buttons spaced down the front; buttonholes on the opposite placket.
1 region
x 0.40 · y 0.20 · w 0.20 · h 0.48 (high) - CuffsBarrel cuffs with buttons visible on both wrists; cuffs show the same vertical stripe pattern as the sleeves.
2 regions
x 0.22 · y 0.64 · w 0.20 · h 0.18 (high); x 0.58 · y 0.64 · w 0.22 · h 0.18 (high) - Stripe patternVertical repeating stripe pattern composed of dominant medium brown stripes alternating with narrower white and very dark narrow stripes across the entire visible shirt.
1 region
x 0.10 · y 0.20 · w 0.80 · h 0.56 (high) - Fabric finishSmooth, tightly woven poplin-like fabric with a slight sheen visible on chest and sleeve planes.
1 region
x 0.18 · y 0.20 · w 0.64 · h 0.40 (medium) - Visible tuck and waistline interactionShirt is tucked into dark trousers with the lower shirt hidden behind a belt; lower button row and placket meet the trousers at the waist.
1 region
x 0.30 · y 0.66 · w 0.40 · h 0.18 (high)
Other
Studio lifestyle shot showing a model against a plain light background with even soft lighting; image cropped at mid-thigh and top of head.
- Model and poseMale model facing forward with torso angled slightly; hands clasped near midline adjusting cuff area.
1 region
x 0.18 · y 0.08 · w 0.64 · h 0.80 (high) - BackgroundEven, near-white seamless background with no visible props or scenery.
- Lighting and shadowsSoft, diffuse studio lighting with minimal harsh shadows; gentle shadowing under chin and on the sides of the body.
- Crop and framingImage framed from just above the head to mid-thigh, centering the torso and shirt for product display.
Colors
warm medium brown· main stripebright white· contrasting stripevery dark brown· very narrow accent stripe- Overall silhouetteVisible front view of a long-sleeve, button-front shirt with a straight hem tucked into trousers; shirt shows chest, sleeves, and collar area.
- 02

Product
Folded long-sleeve button-up dress shirt shown from the front with a spread collar, vertical multi-width brown and white stripes, visible placket with four white buttons, and a folded left cuff placed over the lower left front. Two sewn labels are visible inside the collar.
- Overall shapeShirt is neatly folded flat, showing the front body panel centered, a spread collar at the top, and a single sleeve cuff folded over the lower left front.
1 region
x 0.05 · y 0.03 · w 0.90 · h 0.94 (high) - PatternVertical stripes running top to bottom consisting of a dominant brown ground with alternating white and narrower lighter stripes in a repeating sequence.
1 region
x 0.06 · y 0.12 · w 0.88 · h 0.82 (high) - Collar constructionSpread collar with visible collar stand; collar interior shows the same striped pattern oriented horizontally around the stand.
1 region
x 0.24 · y 0.03 · w 0.52 · h 0.18 (high) - Placket and buttonsCentre-front placket with four visible round white buttons sewn with thread; buttons are evenly spaced down the visible front panel.
1 region
x 0.43 · y 0.19 · w 0.14 · h 0.72 (high) - Cuff detailLeft sleeve cuff folded over the shirt front, showing a rectangular two-button barrel cuff with two white buttons and visible buttonholes.
1 region
x 0.06 · y 0.58 · w 0.28 · h 0.28 (high) - Fabric finishSmooth, lightweight woven poplin appearance with a fine even weave and a slight sheen under the lighting.
- Collar labelsTwo sewn labels visible inside the collar: a black rectangular label at the collar stand and a white rectangular label below it.
2 regions
x 0.39 · y 0.06 · w 0.22 · h 0.09 (high); x 0.41 · y 0.11 · w 0.18 · h 0.07 (high) - Label text - prominent“31”
1 region
x 0.41 · y 0.06 · w 0.07 · h 0.06 (high) - Label text - brand panel“THOMAS MASON”
1 region
x 0.42 · y 0.12 · w 0.16 · h 0.04 (high) - Label text - fabric line“FABRICS | TISSUS”
1 region
x 0.42 · y 0.14 · w 0.15 · h 0.03 (high)
Other
Studio product shot with neutral light gray background, even diffuse lighting, and slight shadow along the left and bottom edges; image is centered and cropped to show the folded shirt fully.
- Background and stagingPlain light gray seamless background filling the frame with the shirt centered on it.
- Lighting and shadowDiffuse even lighting with a soft shadow visible to the lower-left of the shirt indicating a light source from upper-right.
- Shot compositionTop-down view of a folded shirt occupying most of the image area, with slight left-right cropping margin and full collar visible.
Colors
warm medium brown· shirt basewhite· vertical stripespale gray brown· narrow accent stripesgloss white· buttons- Overall shapeShirt is neatly folded flat, showing the front body panel centered, a spread collar at the top, and a single sleeve cuff folded over the lower left front.
Variants
8 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 4745947 | Brown-Stripe Poplin Shirt An Exclusive Collaboration Made In Canada Standard Fit - Patterned Brown - 145 | CA$375.00 | Yes |
| 4745948 | Brown-Stripe Poplin Shirt An Exclusive Collaboration Made In Canada Standard Fit - Patterned Brown - 150 | CA$375.00 | Yes |
| 4745949 | Brown-Stripe Poplin Shirt An Exclusive Collaboration Made In Canada Standard Fit - Patterned Brown - 155 | CA$375.00 | Yes |
| 4745950 | Brown-Stripe Poplin Shirt An Exclusive Collaboration Made In Canada Standard Fit - Patterned Brown - 160 | CA$375.00 | Yes |
| 4745951 | Brown-Stripe Poplin Shirt An Exclusive Collaboration Made In Canada Standard Fit - Patterned Brown - 165 | CA$375.00 | Yes |
| 4745952 | Brown-Stripe Poplin Shirt An Exclusive Collaboration Made In Canada Standard Fit - Patterned Brown - 170 | CA$375.00 | Yes |
| 4745953 | Brown-Stripe Poplin Shirt An Exclusive Collaboration Made In Canada Standard Fit - Patterned Brown - 175 | CA$375.00 | Yes |
| 4745954 | Brown-Stripe Poplin Shirt An Exclusive Collaboration Made In Canada Standard Fit - Patterned Brown - 180 | CA$375.00 | Yes |