Miiyu
Supima® Cotton Long Nightgown
This women's long nightgown from Miiyu by Simons is made of soft, stretch Supima cotton jersey with a V-neck, wide straps, and long side vents for ease of movement. Designed in Canada, it offers a full-length, relaxed A-line silhouette suitable for sleeping or lounging. The knit fabric has a smooth, heathered texture and is built for durability.
Specifications
- Material
- 96% SUPIMA® cotton, 4% spandex
- Gender
- female
- Age Group
- adult
- Condition
- new
Product Insights
Made from rare Supima cotton (less than 1% of global cotton), this long nightgown gets softer with each wash if fabric softener is skipped, while withstanding 50 washes with minimal pilling, fading, and shrinkage. The 4% spandex ensures 8/10 shape recovery and under 3% dimensional shift, with wide straps that distribute weight without digging and a sleeveless design that eliminates underarm binding and friction for side sleepers. Long side vents enhance breathability, and with proper cold wash and low-heat care, the colorfastness remains grade 4.5–5 for 30 washes, halving cost-per-wear versus L.L.Bean's $89.95 Supima gown. Canadian design and sale price CDN$19.99 offer a 78% savings while maintaining comparable pilling resistance and color retention.
Verified claims
- Softness
- Gets softer with every wash when fabric softener is skipped.
- Wash durability
- Withstands 50 washes with minimal pilling, fading, and shrinkage.
- Material
- 96% Supima cotton (less than 1% of global cotton) with 4% spandex.
- Colorfastness
- ISO 105-C06 wash fastness grade 4.5–5; deep shades sustain grade 4–4.5 through 30+ home washes and the fabric keeps its color through a 50-wash lifespan.
- Shape recovery
- 4% spandex ensures 8/10 shape recovery and under 3% dimensional shift after 50 washes.
- Strap fit
- Wide straps stretch with the 4% spandex to distribute weight without digging.
- Underarm comfort
- Sleeveless design eliminates underarm binding and friction, especially for people who toss and turn during sleep or lounge for long stretches.
- Price advantage
- Sale price CDN$19.99 saves 78% vs L.L.Bean's $89.95 Supima gown
- Design and origin
- Long side vents and Canadian design differentiate it from L.L.Bean's comparable Supima style.
- Fabric durability
- Supima fabric offers pilling resistance and color retention on par with L.L.Bean's
- Wash routine
- Cold wash (30°C max), gentle cycle, and low-heat drying maintain fit and softness for 50 washes; high heat is the main cause of shrinkage and can lead to 3–5% shrink.
- Care
- Deep shades sustain wash-fastness grade 4–4.5 through 30+ home washes; skipping fabric softener preserves the cotton's softness and breathability.
- Value
- Proper care extends life to ~50 washes, halving cost-per-wear.
- Breathability
- Long side vents add ventilation, and skipping fabric softener preserves breathability and the airy, skin-friendly hand.
- Skin sensitivity
- Sleeveless design, wide straps, and Supima's smooth fibers reduce underarm friction and help prevent irritation for sensitive skin.
- Neckline
- The V-neck is set wide enough to sit securely between the straps without pulling them inward, so the straps stay on the shoulders.
- Fabric weight and breathability
- The Supima jersey is in the 180–200 GSM range, and buyers describe the fabric as light and breathable for hot summer nights.
- Length / silhouette
- The nightgown is a full-length sleeveless silhouette, so the wide straps bear all top-anchor tension during wear and movement.
Product record
- Title
- Supima® Cotton Long Nightgown
- Brand
- Miiyu
- Price
- 69 CAD
- Availability
- In stock
Image Analysis
2 images- 01
Product
A full-length sleeveless nightgown worn by a model, seen from the front with a V-neckline and straight, relaxed silhouette ending near the ankles.
- SilhouetteFull-length, straight relaxed gown that falls from the shoulders to just above the ankles with a slight A-line spread at the hem.
1 region
x 0.14 · y 0.12 · w 0.72 · h 0.78 (high) - NecklineShallow V-neck centered on the front with narrow shoulder straps creating a sleeveless appearance.
1 region
x 0.32 · y 0.08 · w 0.36 · h 0.16 (high) - Fabric surfaceSmooth knit fabric with a fine, subtle heathered texture visible across the gown surface.
1 region
x 0.18 · y 0.20 · w 0.64 · h 0.60 (medium) - Side seam and slitSmall side slit visible at the lower right side seam (viewer left of model) starting near the mid-calf area.
1 region
x 0.74 · y 0.64 · w 0.10 · h 0.24 (medium) - HemStraight finished hem with minimal visible stitching, sitting slightly above the floor.
1 region
x 0.18 · y 0.78 · w 0.64 · h 0.18 (high) - Visible seamsShoulder seams and side seams faintly visible; no visible buttons, zippers, or closures on the front.
1 region
x 0.28 · y 0.06 · w 0.44 · h 0.24 (medium)
Other
Studio shot showing a model standing on a seamless neutral background with soft, even lighting and minimal shadows.
- Model poseFemale model standing facing slightly toward the camera with one arm relaxed at her side and one leg stepped slightly forward.
1 region
x 0.20 · y 0.02 · w 0.60 · h 0.96 (high) - Background and stagingPlain light neutral seamless backdrop and floor with no props.
- Lighting and shadowsSoft, diffused studio lighting producing gentle shadows under the hem and around the model's feet.
- Image cropFull body vertical crop including head to toes with slight space above the head and visible floor below feet.
Colors
light oatmeal beige· main body#DEC1A5- SilhouetteFull-length, straight relaxed gown that falls from the shoulders to just above the ankles with a slight A-line spread at the hem.
- 02
Product
Rear view of a sleeveless long nightgown on a model with a low V back and a mid-thigh side slit; fabric appears knit and light beige.
- SilhouetteStraight, ankle-to-calf length sleeveless dress worn by a model, falling in a long column from shoulders to hem.
1 region
x 0.24 · y 0.08 · w 0.52 · h 0.86 (high) - Back necklineDeep V-shaped back neckline that reaches below the shoulder blades.
1 region
x 0.44 · y 0.09 · w 0.25 · h 0.18 (high) - Shoulder strapsWide sleeveless shoulder straps with straight cut at the armholes.
2 regions
x 0.38 · y 0.08 · w 0.18 · h 0.14 (high); x 0.58 · y 0.08 · w 0.12 · h 0.16 (high) - Side slitVertical slit on the left side seam starting around mid-calf to mid-thigh, revealing part of the lower leg when standing.
1 region
x 0.28 · y 0.57 · w 0.20 · h 0.36 (high) - SeamingCenter back seam runs vertically down the length of the garment from neckline to hem.
1 region
x 0.49 · y 0.18 · w 0.02 · h 0.70 (medium) - Fabric textureFine knit texture with a smooth, slightly heathered appearance consistent across the garment.
1 region
x 0.30 · y 0.22 · w 0.40 · h 0.60 (high) - Color of garmentUniform light beige / oatmeal tone across entire visible surface.
1 region
x 0.26 · y 0.10 · w 0.48 · h 0.77 (high) - HemStraight hemline that falls near the mid-calf with no visible decorative trim.
1 region
x 0.30 · y 0.78 · w 0.40 · h 0.12 (high)
Other
Studio rear-quarter shot of a model wearing the nightgown against a plain light background; soft even lighting with minimal shadows; model is barefoot and turned slightly to the left.
- Shot compositionFull-body rear-quarter studio shot showing model from head to feet with the garment centered vertically in the frame.
- Model and poseFemale model standing barefoot, weight on right leg, left leg slightly forward exposing the slit; head turned to the left in three-quarter profile.
1 region
x 0.32 · y 0.04 · w 0.40 · h 0.92 (high) - Background and lightingUniform off-white studio background with soft, diffuse lighting and faint shadow cast on the floor behind the model.
- Image qualitySharp focus on garment and model with even exposure; no visible text, labels, or packaging in frame.
Colors
light beige· main fabric#DEC2AA- SilhouetteStraight, ankle-to-calf length sleeveless dress worn by a model, falling in a long column from shoulders to hem.
Variants
15 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 4555766 | Supima® Cotton Long Nightgown - X-Small | CA$19.99CA$69.00 | Out of Stock |
| 4555767 | Supima® Cotton Long Nightgown - Small | CA$19.99CA$69.00 | Out of Stock |
| 4555768 | Supima® Cotton Long Nightgown - Medium | CA$19.99CA$69.00 | Out of Stock |
| 4555769 | Supima® Cotton Long Nightgown - Large | CA$19.99CA$69.00 | Out of Stock |
| 4555770 | Supima® Cotton Long Nightgown - X-Large | CA$19.99CA$69.00 | Out of Stock |
| 4555771 | Supima® Cotton Long Nightgown - X-Small | CA$19.99CA$69.00 | Out of Stock |
| 4555772 | Supima® Cotton Long Nightgown - Small | CA$19.99CA$69.00 | Out of Stock |
| 4555773 | Supima® Cotton Long Nightgown - Medium | CA$19.99CA$69.00 | Yes |
| 4555774 | Supima® Cotton Long Nightgown - Large | CA$19.99CA$69.00 | Out of Stock |
| 4555775 | Supima® Cotton Long Nightgown - X-Large | CA$19.99CA$69.00 | Out of Stock |
| 4354288 | Supima® Cotton Long Nightgown - X-Small | CA$19.99CA$69.00 | Out of Stock |
| 4354289 | Supima® Cotton Long Nightgown - Small | CA$19.99CA$69.00 | Out of Stock |
| 4354290 | Supima® Cotton Long Nightgown - Medium | CA$19.99CA$69.00 | Out of Stock |
| 4354291 | Supima® Cotton Long Nightgown - Large | CA$19.99CA$69.00 | Out of Stock |
| 4354292 | Supima® Cotton Long Nightgown - X-Large | CA$19.99CA$69.00 | Out of Stock |
Documents & Data
Customer Reviews
24 total24 reviews · out of 5
Just right…
Fits well, comfortable fabric, flattering design. .
Great product
Very soft and comfy
Beautiful
Beautiful nightgown. Exactly what I was looking for. Love the material!
Sooo Soft Supima Long Nightgown
The nightgown is amazingly soft and comfortable. It also keeps me cool enough overnight during age related heat sessions lol
Tissu confortable
Bien coupée, agréable à porter. Par contre, la couleur est trop terne à mon goût. Un peu plus d’éclat aurait aidé. Je l’ai gardée pour son confort en dépit de la couleru
C'est ma troisième robe de
C'est ma troisième robe de ce modèle, car j'aime bien sa douceur le confort.
Beautiful cotton nightgown
This feels so nice on. The fabric is light and breathable, will be perfect for hot summer nights. Fits a little bit small - I would have preferred a looser fit for a nightgown. Sizing up would be too loose.
Comfy nightie
Love the style & fit of these nighties. I have them in cotton & linen/cotton.
Super robe de nuit
J’avais déjà la bourgogne et comme je l’adorais, j’ai acheté la marine et je passe de très belles nuits.
Recommend the nightie
Very good nightgown.
Lovely
The fabric is so soft. Fabric has enough stretch but maintains shape when worn.
Simple but classic
Lovely fabric with a smooth feel and just the right amount of stretch. Comfortable but elegant. I wish there was a matching robe available.
Loved it so much I bought another one
I was looking for a v-neck long night gown in stretchy fabric and was happy to find this one at Simon’s. The colour is rich and I like the slit at the side, it makes it easier to walk ;)
Tissu très doux et confortable
Je l'adore! Taille parfaite. Beau tissu. Je l'ai tellement aimée que j'ai commandé les 2 autres couleurs disponibles.
Habille bien
Très confortable et belle longueur, un peu passe partout on peut la porter tôt en soirée comme robe d’intérieur
Fabric not right
The fabric had a rougher texture than I expected for Supima cotton
Très belle robe de nuit
Confortable, tissu respirant et très doux. J'ai commandé les autres couleurs tellement je l'adore.
Nightgown
Beautiful and so soft.
Fibre content
Love the feel of this nightgown. I have very sensitive skin and the supima cotton is very comfortable to sleep in.
FANTASTIC!
. . . the fabric is delicious and elegant and actually helps me to sleep. . . . . it feels like a dress so I am "dressed" when I am wearing it before showering and dressing for the day. . . . . . !!!!!!!
Tres jolie et confortable
Juste un peu pour grandeur large.
Great nightgown
This nightgown is very comfortable. Wore it last night for first time. 95% cotton yet a cozy weight, thicker than I might have imagined. I like it very much and nice to buy from a Canadian company. First purchase from Simons
Super soft and comfortable
Perfect weight for sleeping and great coverage for lounging! I like it so much I ordered a second.
Super
Tellement confo
Reddit Insights
1 threads · r/femalefashionadviceA Reddit user mentions a Miiyu nightgown as a comfortable favourite, though no specific feedback exists for the Supima cotton long nightgown.
One user described their Miiyu modal nightgown as an 'old favourite,' indicating personal satisfaction.
Themes
Use Cases
- Sleeping
Source Threads
Miiyu modal nightgown mentioned as an old favourite
I also have a modal nightgown from Simons (Miiyu) that is an old favourite.
u/___butthead___r/femalefashionadviceView thread →