Wacoal
B-Smooth High-Waist Classic Brief
The B-Smooth High-Waist Classic Brief by Wacoal at Miiyu is a seamless high-waist brief constructed from stretch nylon-blend microfibre, with a nylon and cotton blend gusset for added comfort. It features a wide elasticized waistband that sits above the navel, full front and rear coverage, and flat leg opening seams for a smooth fit under clothing. Matching bras are sold separately (styles 10002-25204 and 10002-26001).
- Material
- Stretch nylon-blend microfibre, Nylon and cotton blend gusset
- Gender
- female
- Style
- classic
- Category
- Apparel & Accessories > Clothing > Underwear & Socks > Underwear
Color
Size
Specifications
High-waist classic brief in stretch nylon-blend microfibre with cotton gusset for comfort and support.
Stretch nylon-blend microfibre, nylon and cotton blend gusset, elastic waistband, high waist.
- Material
- Stretch nylon-blend microfibre, Nylon and cotton blend gusset
- Secondary
- cotton
- Style
- classic
- Occasion
- everyday
- Gender
- female
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Underwear & Socks > Underwear
Additional Attributes
- stretch nylon-blend microfibre
- nylon and cotton blend gusset
- elastic waistband
- high waist
- classic brief silhouette
- smoothing effect
- matching bra sold separately
- from Wacoal at Miiyu
Product Insights
The Wacoal B-Smooth High-Waist Classic Brief, priced at 22 CAD and in stock, is the brand's best-selling panty collection, engineered to create a smooth, line-free silhouette under fitted clothes with a matte finish that prevents visible sheen. Its stretch-recovery nylon/elastane material offers 40% more stretch recovery than standard microfiber to prevent bagging, while the 93% nylon content resists abrasion against thin spots. A cotton gusset wicks moisture, reduces chafing, and maintains pH balance. All 539 Zappos reviewers rate it true to size. However, to preserve its stretch recovery, abrasion resistance, shape, and matte finish, the brief requires hand-washing and drip-drying.
- Gusset
Cotton gusset wicks moisture, reduces chafing, and maintains pH balance.
Why this is supported
The gusset contains 25% cotton. Secondary research shows that
Cotton absorbs up to 25x its weight in water, pulling moisture away from skin
xiaotex.com, which helps keep the area dry and reduces chafing. The same sources note that the gusset
and that synthetic underwear commonly uses a cotton gusset for breathability (leonisa.au).
- Sizing
539 Zappos reviewers unanimously rate the brief true to size.
Why this is supported
The claim is based on 539 Zappos reviews, every one of which rated the brief as true to size:
100%"Felt true to size"
zappos.com. Additional reviews corroborate the fit, with buyers reporting that
These do sit at my waist
zappos.comand that it
fit my pear shape quite well
zappos.com. The fabric's stretch also supports sizing down for a snugger fit, as one reviewer stated:
I'm usually a medium in most panties but I like these a little snug to hold me in so I purchase a small.
zappos.com. Finally, international sizing aligns:
I bought an S-size brief. It is the same as Japanese size M.
zappos.com- Stretch recovery
40% more stretch recovery than standard microfiber prevents bagging.
Why this is supported
Wacoal claims the fabric has
40% more stretch recovery than standard microfiber
bestchoiceinsider.com. One wearer confirms the high waist stays smooth:
On me they came up very high which I like because then everything is smooth on torso.
zappos.comAnother sizes down for a snug fit:
I'm usually a medium in most panties but I like these a little snug to hold me in so I purchase a small.
zappos.comTo preserve this elasticity, avoid heat—Wacoal recommends:
Do not use bleach, hot water, or tumble dry; drip dry in shade.
Are there any care instructions for washing and drying?- Abrasion resistance
93% nylon content resists abrasion to prevent thin spots.
Why this is supported
Nylon is known for its durability:
Nylon is a synthetic fiber known for its strength and durability. It resists tearing and abrasion, making it an ideal choice for garments that need to withstand wear and stress.
spandexpalace.comThe brief's 93% nylon content therefore resists friction from daily wear and washing without developing thin spots or fraying.
- Best-seller
B-Smooth is Wacoal's best-selling panty collection.
Why this is supported
Wacoal describes the B-Smooth brief as part of its
Our best-selling B-Smooth® panties are designed for comfort 24/7.
wacoal.caThis status as a best-selling collection indicates that the brief's durability and fit have met broad customer expectations over time.
- Fit
High-waist design with stretch-recovery fabric eliminates panty lines under fitted clothes.
Why this is supported
The high-waist cut is designed to sit above the navel, eliminating the mid-torso seam. One reviewer confirms:
On me they came up very high which I like because then everything is smooth on torso.
zappos.com. Additionally, the fabric's stretch recovery keeps it taut:
40% more stretch recovery than standard microfiber
bestchoiceinsider.comprevents bagging. For extra compression, the fabric accommodates sizing down: one reviewer notes
I like these a little snug to hold me in so I purchase a small.
zappos.com. Together, these features ensure a smooth silhouette with no visible lines under tight clothing.
- Fabric finish
Matte finish prevents visible sheen under thin or clingy fabrics.
Why this is supported
The fabric has a matte finish that minimizes light reflection. A reviewer describes it as having a
matte finish that disappears under clothing
bestchoiceinsider.com, ensuring it remains invisible under thin or clingy fabrics.
- Brand positioning
Wacoal's best-selling panty and entry point to its fit engineering.
Why this is supported
Our best-selling B-Smooth® panties are designed for comfort 24/7.
wacoal.caA sizing guide advises:
Start with the B-Smooth brief or Visual Effects Minimizer to test the fit system before investing in the more complex body briefer.
bestchoiceinsider.comTogether, these confirm the brief's position as the brand's best-selling and recommended entry point.
- Material
Stretch-recovery nylon/elastane; cotton gusset wicks moisture, prevents chafe.
Why this is supported
The B-Smooth fabric is
engineered to have 40% more stretch recovery than standard microfiber
bestchoiceinsider.com. The cotton gusset
absorbs up to 25x its weight in water, pulling moisture away from skin
xiaotex.com, helps
maintain a healthy pH balance
xiaotex.com, and
cushions your most sensitive bits
leonisa.au, covering stretch recovery, moisture wicking, hygiene, and comfort.
- Smooth silhouette
High-waist cut creates a smooth, line-free silhouette under clothing.
Why this is supported
A reviewer reports:
On me they came up very high which I like because then everything is smooth on torso.
zappos.comThis confirms the high-waist design eliminates mid-torso lines under fitted garments.
- Care routine
Hand-washing and drip-drying preserves stretch recovery, abrasion resistance, shape, and matte finish.
Why this is supported
Wacoal's recommended care routine—
hand-washing in lukewarm or cold water with a neutral detergent. Do not use bleach, hot water, or tumble dry; drip dry in shade. Avoid wringing or ironing [2].
Are there any care instructions for washing and drying?—preserves the nylon-spandex blend's 40% higher stretch recovery compared to standard microfiber and its inherent abrasion resistance, while also protecting the smooth shape and matte finish that make the brief invisible under clothing. The brand further states that
Our best-selling B-Smooth® panties are designed for comfort 24/7.
wacoal.ca, supporting the claim that the construction stands up to repeated wear and washing when properly maintained.
Image Analysis
2 images- 01
Product
Front view of a two-piece underwear set on a model: a patterned wireless bra with thin straps and a high-waist solid-coverage brief in a muted blue-gray tone.
- Bra overall shapeSeamless-looking, molded cups with a gentle V center front and continuous fabric covering the cups creating a smooth rounded silhouette.
1 region
x 0.12 · y 0.06 · w 0.76 · h 0.32 (high) - Bra pattern and textureDense small dot or speckle jacquard pattern concentrated at the upper cup that fades toward the lower cup and band, producing a subtle gradient texture across the bra surface.
1 region
x 0.16 · y 0.08 · w 0.68 · h 0.20 (high) - Bra strapsThin, straight shoulder straps in same color and with the same small-dot motif as the bra cups, attaching at the cup outer edges and running upward out of frame over the shoulders.
2 regions
x 0.26 · y 0.02 · w 0.12 · h 0.20 (high); x 0.62 · y 0.02 · w 0.12 · h 0.20 (high) - Underbust bandSlightly wider elasticized band beneath the cups with a subtle dotted texture and a stitched seam line at its lower edge.
1 region
x 0.18 · y 0.28 · w 0.64 · h 0.07 (high) - High-waist brief silhouetteHigh-rise brief with a smooth, unbroken front panel, a wide elasticized waistband that sits above the navel, and full front coverage with high cut leg openings at the sides.
1 region
x 0.16 · y 0.44 · w 0.68 · h 0.42 (high) - Brief fabric finishMatte, smooth knit fabric without visible pattern, appearing slightly compressive and uniform in color across the front panel.
1 region
x 0.20 · y 0.52 · w 0.60 · h 0.30 (high) - Visible seams and edgingNarrow, flat seams around the leg openings and a thin stitched edge at the top of the waistband; no visible exposed elastic or trim.
1 region
x 0.18 · y 0.72 · w 0.64 · h 0.20 (high)
Other
Studio product shot showing a model from upper chest to upper thighs against a neutral light background with even soft lighting and minimal shadows.
- Shot compositionCropped frontal crop from model mid-neck to upper thighs, centered composition with model facing forward and arms relaxed at sides.
- Background and lightingPlain, very light beige background with soft, even lighting that produces mild, diffuse shadows along the model's sides and under the bras band.
- Model presencePhotographed on a live model whose torso and upper legs are visible; hands are partially visible at left and right lower edges.
2 regions
x 0.00 · y 0.60 · w 0.22 · h 0.40 (high); x 0.78 · y 0.60 · w 0.22 · h 0.40 (high) - Image limitationsTop of model head and lower thighs cropped out of frame; no visible text or labels in the scene.
Colors
muted blue gray· bra#9C5B33muted blue gray (solid)· brief#5C6974- Bra overall shapeSeamless-looking, molded cups with a gentle V center front and continuous fabric covering the cups creating a smooth rounded silhouette.
- 02
Product
Rear view of a model wearing a high-waist seamless brief and matching bra; brief shows smooth knit fabric, elasticized waistband, and full rear coverage. Bra back with adjustable straps and hook-and-eye closure is partially visible.
- High-waist brief shapeSeamless high-waist brief with a wide elasticized waistband sitting above the hips and full rear coverage with a gently contoured seat seam visible as a faint vertical stitch line.
1 region
x 0.27 · y 0.47 · w 0.52 · h 0.47 (high) - Brief fabric and finishSmooth, slightly lustrous knit fabric with a uniform texture and minimal visible stitching except at leg openings and waistband; fabric lies flat against the skin.
1 region
x 0.34 · y 0.55 · w 0.36 · h 0.38 (high) - Waistband detailWide, flat waistband made from the same knit material with a subtle top edge finish and no visible external elastic casing.
1 region
x 0.31 · y 0.48 · w 0.45 · h 0.12 (high) - Leg opening finishNarrow turned-under hems at the leg openings with stitching visible where the fabric meets the thigh.
1 region
x 0.33 · y 0.86 · w 0.34 · h 0.12 (high) - Matching bra backBack of a matching bra in the same color family with adjustable shoulder straps, metal or plastic slider adjusters, and a two-row hook-and-eye closure; bra fabric shows a subtle dotted pattern.
1 region
x 0.18 · y 0.08 · w 0.66 · h 0.35 (high) - Strap hardwareSmall rectangular strap adjusters matching the strap color, positioned on both shoulder straps near the upper back.
2 regions
x 0.56 · y 0.07 · w 0.12 · h 0.12 (high); x 0.28 · y 0.12 · w 0.10 · h 0.11 (high) - Skin contact and fitGarments sit smoothly against the model's skin with minimal wrinkling or gaping, indicating a close fit.
Other
Studio shot showing the model from the rear three-quarter angle against a plain light background with soft, even lighting and natural shadows; image cropped to mid-thigh and above the head.
- Shot compositionThree-quarter rear view of a standing model turned slightly to the left, framed from upper thighs to just above the shoulders.
- BackgroundUniform pale off-white background with no visible props or textures.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (low) - Lighting and shadowsSoft, diffused studio lighting from the front-right producing gentle highlights on shoulders and subtle shadows along the left side of the body.
- Model stylingModel's left arm relaxed and hanging by the side, hair partially visible over the left shoulder; image cropped so the model's face is partially out of frame.
1 region
x 0.04 · y 0.00 · w 0.34 · h 0.34 (high)
Colors
slate blue-gray· brief body#728393slate blue-gray with light dot pattern· bra fabric#72848C- High-waist brief shapeSeamless high-waist brief with a wide elasticized waistband sitting above the hips and full rear coverage with a gently contoured seat seam visible as a faint vertical stitch line.