Undie-tectable support bikini panty Nylon product image (primary)
Flat-lay front view of a black high-rise bikini panty with a wide smooth fold-over top panel, curved leg openings, and visible front gusset seam; fabric appears matte and stretch-knit.

Spanx

Undie-Tectable Support Bikini Panty Nylon

4.1/5 (33)
CA$38.00CAD
In Stock

This is a Spanx Undie-Tectable Support bikini panty, a women's undergarment made from a nylon and microfibre blend with a 100% cotton gusset. It features laser-cut, seamless construction and a high-rise, fold-over waistband, designed to provide light everyday shaping and support. Intended for daily wear, it creates a smooth, invisible foundation under fitted clothing.

Material
Ultra silky microfibre, 100% cotton gusset
Gender
female
Style
casual, minimal, modern
Category
Apparel & Accessories > Clothing > Underwear & Socks > Shapewear

Color

Black

Size

SMALLMEDIUMLARGEX-LARGE

Specifications

Ultra silky microfibre bikini panty with seamless construction and light support for everyday shaping.

Laser-cut seamless edges, 100% cotton gusset, light slimming support

Material
Ultra silky microfibre, 100% cotton gusset
Secondary
cotton
Style
casual, minimal, modern
Occasion
everyday, loungewear
Gender
female
Age Group
adult
Condition
new
Category
Apparel & Accessories > Clothing > Underwear & Socks > Shapewear

Additional Attributes

  • ultra silky microfibre fabric
  • 100% cotton gusset for maximum comfort
  • laser-cut edges for invisibility
  • seamless construction
  • designed to slim figure in strategic areas
  • everyday light support
  • invisible under clothing

Product Insights

Spanx Undie-Tectable Support Bikini Panty Nylon ($38, in stock) offers light tummy control through slimming panels, adjustable by size, and rear coverage that stays in place despite varying by body type. Its cotton gusset wicks moisture, prevents odor, and remains invisible under thin leggings or light-colored pants. As the lightest compression tier in Spanx's shaping line, it provides comfortable all-day smoothing without riding down, though laser-cut edges lose invisibility after 15–20 washes (extendable with delicate care). Sizing varies across batches, prompting some to size down, and the 77% nylon/23% elastane fabric feels rougher with edges curling over time. Fans repurchase for its reliable no-show effect and mild shaping, despite shifts in fabric and sizing.

Verified claims

Tummy control
Slimming panels provide light tummy control, adjustable by size.
Rear coverage
Buyers report it avoids cutting the buttocks and stays in place, with rear fit varying by body type.
Compression via size
Choosing a smaller size increases tummy control but can create a muffin top, while a larger size is more comfortable but provides less shaping.
Hygiene
Cotton gusset helps prevent yeast infections and irritation.
Moisture management
Cotton gusset wicks moisture, prevents odor, and protects outer clothes from stains.
Discreetness
The cotton gusset is a small, thin panel positioned to avoid visible lines, so it is unlikely to show through thin leggings or light-colored pants.
Waistband
Wearers report the waistband stays in place without digging or rolling during all-day movement; those between sizes may prefer sizing down for a more secure fit and less rolling.
Compression level
Lightest compression level in Spanx's shaping tiers.
Shaping variant
Has light shaping panels; the Undie-Tectable Lace Bikini has none.
Comfort
Buyers report comfortable all-day wear with effective smoothing.
No-show
Buyers confirm it vanishes under leggings, thin dresses, and tight pants, though some reviews note visible rear lines or an odd rear fit.
Gusset vs body feel
The cotton gusset provides the primary breathability in this otherwise synthetic microfibre panty, helping prevent heat buildup and stickiness during all-day wear.
Edge lifespan
Laser-cut edges stay invisible for 15–20 washes before curling.
Edge care
Washing in a delicates bag on cold and air-drying extends edge flatness to 6–12 months.
Travel
Hand washes and dries overnight.
Fit
Provides light tummy control without riding down.
Sizing
Sizing runs slightly generous; 83% of reviewers found the brief true to size, but several note a relaxed fit and prefer sizing down.
Durability
77% nylon/23% elastane fabric feels rougher; edges curl after 20 washes.
Overall loyalty & changes
Fans repurchase for no-show and light compression, though some long-time buyers report a rougher fabric and possible sizing changes.

Product record

Title
Undie-Tectable Support Bikini Panty Nylon
Brand
Spanx
Price
38 CAD
Availability
In stock

Image Analysis

2 images
Undie-tectable support bikini panty Nylon product image (primary)
01

Product

Flat-lay front view of a black high-rise bikini panty with a wide smooth fold-over top panel, curved leg openings, and visible front gusset seam; fabric appears matte and stretch-knit.

  • Overall shapeFlat-lay front-facing bikini panty with a high-rise wide top panel that extends across the waist and a contoured lower bikini section with curved leg openings.
    1 regionx 0.05 · y 0.18 · w 0.90 · h 0.62 (high)
  • Waist/top panelWide smooth top panel that appears folded or doubled over, forming a continuous, unbroken band across the upper portion of the panty.
    1 regionx 0.05 · y 0.18 · w 0.90 · h 0.25 (high)
  • Leg openingsSymmetrical curved leg openings with narrow, smooth edges and no visible elastic casing.
    1 regionx 0.12 · y 0.45 · w 0.76 · h 0.35 (high)
  • Seam detailVisible stitched seam along the center front/gusset area and faint horizontal stitch lines where the top panel meets the lower section.
    1 regionx 0.32 · y 0.56 · w 0.36 · h 0.18 (high)
  • Fabric appearanceUniform, smooth, matte stretch-knit fabric with slight surface texture visible in the lower right curved area as subtle light falloff and creasing.
    1 regionx 0.55 · y 0.55 · w 0.28 · h 0.28 (high)

Other

Studio flat-lay product shot on a white background with even front lighting and slight soft shadowing beneath the panty; image is centered and uncropped.

  • Shot compositionCentered flat-lay product photographed against a clean white background, showing the full front of the garment with even lighting.
  • BackgroundSolid white background filling the frame.
  • Lighting and shadowSoft, diffuse lighting with a faint shadow below the panty suggesting studio illumination from above.
    1 regionx 0.10 · y 0.70 · w 0.80 · h 0.20 (medium)
  • Image qualityHigh-resolution image with clear edges and visible fabric texture; no visible text or tags on the product.

Colors

matte black· main fabric#0E0E0E
Undie-tectable support bikini panty Nylon product image 2
02

Product

Flat-laid rear view of a black bikini-style panty with a wide high-rise waistband and a smooth single-piece back panel with a shallow curved seam line across the upper rear.

  • Overall silhouetteFlat-laid rear-facing bikini panty with a wide straight waistband at the top and a rounded lower back panel forming the leg openings.
    1 regionx 0.05 · y 0.15 · w 0.90 · h 0.75 (high)
  • WaistbandWide high-rise waistband that appears as a single smooth band without visible elastic or topstitching along its top edge.
    1 regionx 0.06 · y 0.15 · w 0.88 · h 0.20 (high)
  • Back panel seamShallow, gently curved seam line runs horizontally across the upper portion of the back panel, creating a subtle arc shape.
    1 regionx 0.12 · y 0.28 · w 0.76 · h 0.14 (high)
  • Fabric appearanceSmooth, uniform knit fabric with a matte finish and no visible texture pattern or lace; fabric lies flat with minimal wrinkling.
    1 regionx 0.10 · y 0.30 · w 0.80 · h 0.60 (high)
  • Seam at leg openingNarrow stitched hem visible along the bottom rounded edge where the leg openings would be, appearing as a faint linear stitch.
    1 regionx 0.10 · y 0.70 · w 0.80 · h 0.16 (medium)

Other

Studio flat-lay product shot on a plain white background with even lighting and minimal shadows; image is centered and evenly cropped around the garment.

  • Background and compositionProduct is centered on a uniform white background with substantial white space above and around the garment.
    1 regionx 0.00 · y 0.00 · w 1.00 · h 1.00 (high)
  • Lighting and shadowEven diffuse lighting with a faint soft shadow under the lower edge of the panty, indicating studio illumination from above.
    1 regionx 0.05 · y 0.75 · w 0.90 · h 0.20 (medium)
  • Image cropGarment is fully visible within the frame with small margins on left and right and larger white space above.

Colors

matte black· main fabric#1D1D1D

Customer Reviews

33 total
4.1

33 reviews · out of 5

Parfait!

Anonymous

Parfait!

Bizarre à la fesse

Laurie L.

Le ventre a un bon maintient, mais ça m'arrive vraiment étrange à la fesse, assurément c'est visible. J'avais commandé small car il y a 2 ans j'ai acheté le medium et il est trop grand, mais soit ils ont changé leur modèle et leur charte de taille, soit ce modèle ne me couvient simplement pas en small.

Ne monte pas assez haut.

Anonymous

Ne monte pas assez haut.

Parfaite

Christiane M.

Parfaite

Confort et maintien

Diane P.

Maintien. oui.

Comfy

Sandra C.

Like these - my favourite.

I have purchased in the

Alessandra

I have purchased in the store but had to order online as stores are closed.

Bikini maintient

Céline L.

Trop grande

Definitely tectable

susan m.

Uncomfortable and unflattering but otherwise expensive

Comfortable

Jessica A.

Surprisingly comfortable.

Love this undergarment

Indira N.

Worth the price for a very comfortable light control with no muffin topping or lines

Mieux qu avant

Anonymous

Mieux qu avant

Ce modèle n’est pas Undie-tectable.

Nathalie H.

Ce modèle n’est pas Undie-tectable.

Maintien léger

Sonia G.

Confortable mais malheureusement le haut de la culotte roule facilement.

Iem

Francine S.

Idem

Bon maintien ventral, indétectable sous

Anonymous

Bon maintien ventral, indétectable sous les vêtements

Bikini

Cecile M.

Très confortable

Bikini dee maintien

Cecile M.

Très confortable

La petite culotte parfaite

Francine S.

Un bon support et aucune couture

Perfect fit.

Simrat S.

Perfect fit, doesn’t ride up.

Fits nicely

Donna

Fits nicely

tres enchanté de ce produit

Gisele D.

tres enchanté de ce produit

tres bon maintien

Simons 1.

tres bon maintien

Super, comme presque tous les

Michelle

Super, comme presque tous les produits Spanks que j'ai achetés.

Parfait

Brigitte

Parfait

Culotte de maintien tout en

Christiane M.

Culotte de maintien tout en étant légère

Les sous-vêtements les plus hallucinants

Dominick P.

Les sous-vêtements les plus hallucinants au monde!

Beau produit, il reste à

Isabelle

Beau produit, il reste à savoir s'il sera durable.

The quality is worse than before

Ada A.

I have been wearing this brand for many years and now I am disappointed with the quality, the fabric has become rougher

too much support

Doreen H.

too much like a girdle,

Maintient sans étouffer

Patricia L.

Ne coupe pas les fesses en 2 parce que cette partie s'ajuste parfaitement sans être apparente. Offre un bon maintien sans excès.

trop haute et tissus roule

Anonymous

trop haute et tissus roule mauvais maintien

PARFAIT

Carolyne L.

PARFAIT

Provenance

Merchant Link
https://www.simons.ca/en/women-underwear/shapewear/shaping-panties-shorts/undie-tectable-support-bikini-panty-nylon--1193-215?colourId=0
Updated