White
White
WHITE
WHITE
Black
Black
Grey Heather
Grey Heather
White
White
WHITE
WHITE
Black
Black
Grey Heather
Grey Heather

Core Y-Back Thong

48 reviews

4002-100-S

Regular price $17.00 Save 0%
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Only 207 items in stock!

C-IN2 Core is the ultimate basic collection of underwear offering a variety of styles and fit to accommodate the wardrobe stapleof every guy.

Tops are made of extra soft Pima Cotton and bottoms offer various pouch support and trim detailing for easy, effortless everyday wear.

The Core collection is available in white, black and heather grey.

100% Cotton/Coton

Underwear Style Guide

(Click to enlarge.)

Waist Sizes

Size IN CM
Extra Small (XS) 25-27 64-69
Small (S) 28-30 71-76
Medium (M) 31-33 79-84
Large (L) 34-36 86-91
Extra Large (XL) 37-39 94-99

Chest Sizes

Size IN CM
Extra Small (XS) 30-32 76-81
Small (S) 34-36 86-91
Medium (M) 38-40 97-102
Large (L) 42-44 107-112
Extra Large (XL) 46-48 117-122

If your package is returned to us because it was unclaimed, undeliverable, rejected, or refused, then we will refund you for the order minus the original shipping fee and a 10% restocking fee.

C-IN2 reserves the right to cancel your order.

FREE U.S. SHIPPING FOR ORDERS OVER $99

C-IN2 offers free Domestic Standard shipping to all states within the United States for orders over $99. Otherwise, Domestic Standard shipping costs just $4.95.

SAME-DAY SHIPPING

In-stock orders received before 1 p.m. Eastern Monday through Friday will ship the same day unless there is a problem verifying payment information.

USA DOMESTIC

Shipping Method Carrier Methods Description Price
Domestic Standard
  • USPS First Class Package Service
  • USPS Priority Mail
  • USPS Parcel Select
  • FedEx SmartPost
  • FedEx Home Service
  • FedEx Ground
  • UPS SurePost
Delivery to addresses within the United States within 3-15 business days. The delivery date is not guaranteed. Free shipping for all orders over $99.

For all orders under $99, a fee of $4.95 will apply.
Domestic Two Day
  • FedEx 2-Day Service
Delivery to addresses within the United States within 2 business days. No PO boxes or military addresses.

No delivery on Saturday or Sunday.

$14.95
Domestic One Day
  • FedEx Standard Overnight
  • FedEx Priority Overnight
Delivery to addresses within the United States within 1 business day. No PO boxes or military addresses. No delivery on Saturday or Sunday. $24.95

CANADA & MEXICO SHIPPING

Shipping Method Carrier Methods Description Price
International Standard
  • USPS First Class Package International Service
  • USPS International Priority Airmail
  • USPS Priority Mail International
Delivery to addresses outside of the United States within 30 business days, but usually in 1-2 weeks. Limited tracking numbers are available with this service. Also commonly known as "air mail." The parcel is tendered to you by your country's postal service. You may be charged brokerage fees by your country's postal service. You may be charged duties and taxes by your country's government. Free shipping for all orders over $99.

For all orders under $99, a fee of $4.95 will apply.


Not available for orders over $200.

International Standard Plus
  • USPS Priority Mail International
Delivery to addresses outside of the United States, usually within 5 business days. Includes a tracking number. The parcel is tendered to you by your country's postal service. You may be charged brokerage fees by your country's postal service. You may be charged duties and taxes by your country's government. $24.95


Not available for orders over $400.

International Priority
  • FedEx International Priority
Delivery to addresses outside of the United States within 2 business days. Includes a tracking number. The parcel is tendered to you by FedEx or a contracting private carrier. You may be charged brokerage fees by FedEx. You may be charged duties and taxes by your country's government. $29.95

OTHER INTERNATIONAL DESTINATIONS

Shipping Method Carrier Methods Description Price
International Standard
  • USPS First Class Package International Service
  • USPS International Priority Airmail
  • USPS Priority Mail International
Delivery to addresses outside of the United States within 60 business days, but usually in 2-3 weeks. Limited tracking numbers are available with this service. Also commonly known as "air mail." The parcel is tendered to you by your country's postal service. You may be charged brokerage fees by your country's postal service. You may be charged duties and taxes by your country's government.

$10.95


Not available for orders over $200.

International Standard Plus
  • USPS Priority Mail International
Delivery to addresses outside of the United States, usually within 10 business days. Includes a tracking number. The parcel is tendered to you by your country's postal service. You may be charged brokerage fees by your country's postal service. You may be charged duties and taxes by your country's government.

$34.95

International Economy
  • FedEx International Economy
  • FedEx International Priority
Delivery to addresses outside of the United States within 3-5 business days. Includes a tracking number. The parcel is tendered to you by FedEx or a contracting private carrier. You may be charged brokerage fees by FedEx. You may be charged duties and taxes by your country's government.

$39.95

International Priority
  • FedEx International Priority
Delivery to addresses outside of the United States within 3 business days. Includes a tracking number. The parcel is tendered to you by FedEx or a contracting private carrier. You may be charged brokerage fees by FedEx. You may be charged duties and taxes by your country's government.

$49.95

CUSTOMS AND BROKERAGE FEES, DUTIES, AND TAXES

For orders that are shipping to destinations outside of the United States (including Canada), you may have to pay duties and taxes to your country's government. This is because you are importing goods from a foreign country into your own country.

C-IN2 does not estimate nor collect these duties and taxes on your behalf. Please contact your country's customs office to obtain an estimate of the duties and taxes, if any, you will have to pay.

We cannot and will not alter, falsify, or in any other way misrepresent or undervalue the declared value of an international shipment. The full amount of the purchased items will be noted on the customs declaration.

In addition to duties and taxes, you may have to pay an additional brokerage fee to either your country's postal system (if your order ships via our International Standard or International Standard Plus shipping methods) or to FedEx (if your order ships via our International Economy and International Priority shipping methods). This fee, which is not estimated nor collected by C-IN2 on your behalf, covers the carrier's cost of expediting the clearance of your shipment through your country's customs process. A typical brokerage fee averages USD 10.00 - 20.00. Check with your local postal office to estimate any brokerage fees, if any, you will have to pay.

If you do not pay duties, taxes, or brokerage fees, then in many cases the parcel will be destroyed by your country's customs office and not sent back to us. In such cases, we will not issue a refund. We can only issue refunds for parcels that are returned to us.

Customer Reviews
4.8 Based on 48 Reviews
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  • pouch
  • C-in2
  • support
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03/06/2020
A
Anonymous
Italy Italy
I recommend this product
  • Can you rate the fit of this product? Too SmallPerfectToo Big

High quality!!!!!!

03/06/2020
VM
VINCENT M.
France France
I recommend this product
  • Can you rate the fit of this product? Too SmallPerfectToo Big

THONG

Magic and would more Thong in C-IN2 collection ! Best regards, Vinus

VINCENT MILLET verified customer review of Core Y-Back Thong
02/10/2020
A
Anonymous
United States United States
I recommend this product
  • Can you rate the fit of this product? Too SmallPerfectToo Big

Loving this thong

It's as comfortable as it is sexy.

01/14/2020
FT
Frankie T.
Malaysia Malaysia
I recommend this product
  • Can you rate the fit of this product? Too SmallPerfectToo Big

Love it very much

I like how the pouch provides just enough support and shows the budge nicely but the highlight is the Y strap that sits on my buttocks and accentuates it.

01/06/2020
C
Chris
Canada Canada
I recommend this product
  • Can you rate the fit of this product? Too SmallPerfectToo Big

Perfectly sexy!

Love them. Just tryied for the 1st time recently. It looked sexy and comfortable on the models. After my 1st pair, I can now confirm that it is the case. Wearing them at the gym or at work withjeans, i feel sexy and comfortable. Just ordered more. Like the other guys, i just wish they made different colors. Wld buy them all.

12/06/2019
VM
VINCENT M.
France France
I recommend this product
  • Can you rate the fit of this product? Too SmallPerfectToo Big

HAPPY & SEXY

Perfect product

09/29/2019
K
Kevin
I recommend this product
  • Can you rate the fit of this product? Too SmallPerfectToo Big

The best thong on the market

This thong is the most comfortable type of thong I have ever worn. The low rise aspect is perfect under jeans. The waistband sits comfortably and doesn’t move around. The pouch is perfectly shaped with the perfect amount of support. My only critique - Why isn’t this offered in more colors and styles?? Would love to get some Zen thongs or Hand Me Down thongs. Not sure why c-in2 only has this one pair, I’d buy way more if they introduced different style thongs.

08/21/2019
SM
Santos M.
United States United States
I recommend this product
  • Can you rate the fit of this product? Too SmallPerfectToo Big

Love

This is the first thing I’ve purchased, and honestly I love it. Feels comfortable (after a bit) waistband is like the rest of their bands for the most part, sexy design. If there were more colors I’d buy them too! I also bout my regular size and it turned out just fine :)

06/18/2017
T
Takashi
Taiwan Taiwan

It's OK

A little big

08/13/2016
WI
Will I.
Atlanta

Yes. I definitely would buy the product again and again!

These are perfect for almost if not all my needs! Airy, cool, and no worries about underwear lines showing through.

07/11/2016
C
Clark
Taiwan Taiwan

I recommend it, you can buy

I quite like CORE LO NO SHOW PROFILE BRIEF. I almost every year fixed purchase buy some. It's quite comfortable fabrics, the design is quite stylish. I quite recommend it.

05/26/2016
M
mattc
NYC

PERFECTION

This is perfect for any use. Very comfortable and very sexy at the same time. My new favorite underwear!

01/02/2016
DJ
Diver J.
Charleston, SC

Great - give it a shot

Have to admit I used to laugh at the idea of thongs for guys. I gave them a shot because I never found any underwear to be comfortable. Tried these and they're awesome. Plenty of room in the front, keeps everything in place but feels like you're wearing nothing at all. Has been great for working out or just normal everyday. Will buy more for sure.

12/28/2015
AG
Albert G.
Texas

Wardrobe Essential

By far some of the best thongs out there. Super comfortable fit that can take you from the gym to a night out. Underwear construction is great and the y-back keeps things from not shifting throughout the day. Only wish there were more color options available.

09/08/2015
F
Fabricator
Georgia Mountains

Practical undergarment for athletes

I ordered these out of frustration at the fit of most Men's underwear. I am 6' tall and 160 lbs with a 29w/32l jeans size, but with reasonably muscular thighs; this puts me in a small with most underwear. Though the waist of a small is suitable, the pouch and particularly the leg openings are not. I went with a thong out of both frustration and curiosity---it worked. Since then, I bought 4 types of high quality thongs and found the fit and quality of these to be best. I now use them for both gymnastics training, running and daily wear in my metal fabrication shop.

09/02/2015
N2
Nurse 2.
Des Moines, IA

Feels like wearing nothing!

When you put this on it feels like your not really wearing anything at all! This thing is super comfortable and there is room in the pouch for your goods without spilling over!

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