[BYC] Children’s Thermal Underwear Set [OCB0001] Gray – Size 65
Benefits at-a-Glance
Points | Earn 9.99P |
Shipping | ![]() |
Shipping Area | All regions in the USA |
Storage Method | Refer to the product information below |
Max Purchase Quantity | You can purchase up to 1 items at once. |
Products to buy together
BYC Innerwear
Cotton Innerwear
Since 1946 BYC
Nation's innerwear, BYC cotton innerwear, where long experience and technology meet
The cotton fabric has a thicker weave than general innerwear, making it softer with excellent protection. The fabric’s cotton side is woven so that the shape remains stable without collapsing. The structure is sturdy and ideal as a warm material in winter.
- Cotton Weave
- 100% Cotton
- Warmth
Why BYC Cotton Innerwear is Special
-
100% Cotton Fabric Gentle on Skin
BYC cotton innerwear uses high-quality yarns spun with at least 40s count standards, ensuring premium guaranteed quality. -
Lightweight and Easy to Manage
It has a lightness and warmth that is not too thick or stuffy, making it easier to care for than other materials. -
No Skin Irritation, Excellent Sweat Absorption
The fabric has low skin irritation and good breathability and absorption, effectively managing sweat and moisture produced during sleep.
GY_Gray
(Image of a child wearing gray innerwear set)
Detail
Take a Closer Look
Neck and shoulder stitching
Point: The neck and shoulder seamline of BYC cotton innerwear is neat and not bulky, providing comfortable wear.
Soft waistband
Point: The waistband of BYC cotton innerwear is neither too thick nor tight, maintaining comfort even after long wear.
Cuff treatment
Point: The sleeve cuffs and ankle cuffs are carefully finished to reduce wear and tear.
High-quality thick yarn
Point: BYC cotton innerwear has good breathability, is not stuffy, and feels comfortable for sleeping.
Size Guide
(Illustration indicating chest circumference and hip circumference)
Detail Info
- Elasticity: Medium
- Thickness: Medium
- Opacity: None
- Softness: Soft
Children’s Top and Bottom Sizes (cm)
- Size 60: Chest 57-63 / Hip 55-63 / Age 3-4
- Size 65: Chest 63-69 / Hip 63-70 / Age 5-6
- Size 70: Chest 69-75 / Hip 70-78 / Age 7-8
- Size 75: Chest 75-81 / Hip 78-85 / Age 9-10
- Size 80: Chest 81-87 / Hip 85-89 / Age 11-12
- Size 85: Chest 87-93 / Hip 89-92 / Age 13-14
- Size 90: Chest 93-99 / Hip 92-95 / Age 15-16
Unit: cm
* There may be a 1-3 cm difference depending on the measuring method.
California Proposition 65
This warning is provided in accordance with California law. For more information, please visit www.p65Warnings.ca.gov/food
Review

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