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Layers Classic Ribbed Fitted Tank White

Layers Classic Ribbed Fitted Tank White

Color: WHITE

$32.00 USD

Hand Me Down Crew Neck T-Shirt Smoke Heather

Hand Me Down Crew Neck T-Shirt Smoke Heather

Color: SMOKE HEATHER

$29.25 USD $45.00 USD
RO3 High Twist Summer Crew Neck T-Shirt Black

RO3 High Twist Summer Crew Neck T-Shirt Black

Color: BLACK

$6.00 USD $40.00 USD
Layers Slim Crew Neck T-Shirt Black

Layers Slim Crew Neck T-Shirt Black

Color: BLACK

$26.00 USD $40.00 USD
Layers Slim Crew Neck T-Shirt White

Layers Slim Crew Neck T-Shirt White

Color: WHITE

$26.00 USD $40.00 USD

The new shape of men’s fashion

Core Y-Back Thong White
Core Y-Back Thong White
Core Y-Back Thong White
Core Y-Back Thong White
Core Y-Back Thong White
Core Y-Back Thong White
Core Y-Back Thong White
Core Y-Back Thong White
4.7
Rated 4.7 out of 5 stars
210 Reviews

Core Y-Back Thong White

$15.60 USD $26.00 USD
ColorWHITE
Size Size chart

True to size. For loose fit, go one size up.

Fit

12345
SmallTrue to sizeLarge
  • Description
  • Style and Fit
  • Fabric and Care
  • Shipping

One strap, zero lines — Y not?

The Y-back takes the thong one step further: a single elastic strap down the back, a sculpted pouch up front, and 100% cotton everywhere it touches. Barely there, completely comfortable — and nothing shows under anything.

Fabric
100% Cotton. Soft, breathable, and natural against the skin — the broken-in feel of a favorite tee, from the first wear.

Fit & Silhouette
Men's low-rise cotton Y-back thong — sits below the natural waist with a signature Y-back elastic strap and minimal coverage.

Contour Pouch
Sculpted 1-ply contour pouch with center-seam construction — light lift and natural shape, right where you want eyes to land.

Leg Openings
Clean elastic binding sits flat against the skin — no digging, nothing to adjust.

Waistband
1.5" exposed elastic waistband with repeat C-IN2 branding — the frame on a minimal canvas.

Fit note
True to size. For a looser fit, go one size up.

Care
Machine wash.
Imported.

Core

C-IN2's foundation — every essential silhouette, cut in soft, breathable 100% cotton that feels better the longer you own it. The drawer you build once and reach for every day.

Thong style underwear
Low-rise, sits below the natural waistline

Model's height is 6'1"/185 cm, and he is wearing size M.

100% cotton
Machine Wash
Imported

Get free shipping for US orders over $99.

Discreet packaging: plain poly bag or brown box.

For shipping info: C-IN2 Shipping.

Discreetly shipped in a plain brown box or poly bag.

SKU: 4002-100-XXXL

Complete the Set

Need help?

Send us an email at support@c-in2.com.

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4.7
Rated 4.7 out of 5 stars
Based on 210 reviews
95%would recommend these products
Reviews Summary
Customers say these Y-back thongs are incredibly comfortable and feel like wearing nothing at all. The Y-back design is more comfortable than traditional thong styles, with many noting the thin strap is less invasive. Users love the ample pouch space and support, finding them perfect for daily wear, sports, and gym activities. The soft material washes well and maintains durability. Many customers become repeat buyers and recommend sizing up for the best fit, though some find them true to size. A few mention sizing inconsistencies between colors and note the fabric can feel slightly stiff initially.
Customers Talked About
Write a Review (Opens in a new tab)
210 reviews
  • FD
    FREDERICK D.
    Verified Buyer
    Reviewing
    Core Y-Back Thong Grey Heather
    I recommend this product
    Rated 5 out of 5 stars
    5 days ago
    First time

    Jocks and I are no more. Was tired of the adjusting and chaffing. This fit is great. Comfortable and feels good. No regrets.

    Was this helpful?
    C-IN2 New York
    5 days ago

    Hello Frederick,

    Thank you for the wonderful review! We're thrilled the Core Y-Back Thong is working so well for you. We appreciate your support!

  • NW
    Nashan W.
    Verified Buyer
    Reviewing
    Core Y-Back Thong Black
    I recommend this product
    Rated 5 out of 5 stars
    10 months ago
    Runs true to size.

    Runs true to size.

    Was this helpful?
  • PC
    Patrick C.
    Verified Buyer
    Reviewing
    Core Y-Back Thong Black
    I recommend this product
    Rated 5 out of 5 stars
    2 years ago
    Perfect fitting pouch, the Y

    Perfect fitting pouch, the Y back is super comfortable, and they look great and feel wonderfully minimal in jeans and shorts. Will be buying more for sure.

    Was this helpful?
  • BR
    BORIS R.
    Verified Buyer
    Reviewing
    Core Y-Back Thong Grey Heather
    I recommend this product
    Body Type Muscular
    Height 5' 4-5' 6
    Normal Size Worn S
    Size in Other Brands S
    Size Bought XS
    Rated 5 out of 5 stars
    3 weeks ago
    Nice and fits perfectly

    Is nice

    Was this helpful?
    C-IN2 New York
    3 weeks ago

    Hello Boris,

    Thank you for the wonderful review! We're so glad the Core Y-Back Thong fits perfectly and that you're enjoying it.

    Best,
    C-IN2

  • CB
    Carey B.
    Verified Buyer
    Reviewing
    Core Y-Back Thong Black
    I recommend this product
    Body Type Stocky
    Height 5' 10-6' 0
    Normal Size Worn XL
    Size in Other Brands L
    Size Bought L
    Rated 4 out of 5 stars
    1 month ago
    Runs small

    great product, but. A size up.

    Was this helpful?
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Premium Basics, Engineered for Every Body

C-IN2 is a New York–born men’s underwear and apparel brand with one mission: to make every man look good and feel confident. We design premium basics and fashion-forward styles with innovative fabrics, engineered fits, and durable construction that lasts. Working closely with our partners, we create unique materials and refine every detail—from the cut of a t-shirt to the fit of a brief—to deliver comfort and style you can feel every day. Inclusive, empowering, and unapologetically bold—C-IN2 is made for every body.