HEATTECH
Thermal base layers designed to retain body heat, available in regular, Extra Warm, and Ultra Warm weights for men and women.
Everyday essentials
Functional basics and everyday clothing.
UNIQLO is a Japanese clothing brand with U.S. stores and an online shop, known for functional, high-quality basics including HEATTECH thermal wear, AIRism, Ultra Light Down, and the Fluffy Yarn Fleece.
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Key products
- HEATTECH thermals✓
- AIRism✓
- Ultra Light Down✓
- Fleece✓
- Everyday basics✓
Function meets simplicity
About UNIQLO
A Japanese brand known for quality everyday basics and functional technology.
UNIQLO is part of Fast Retailing Co. and operates stores in major U.S. cities and an online store at uniqlo.com/us. It is known for its proprietary fabric technologies: HEATTECH (heat-retaining thermal wear), AIRism (moisture-wicking inner wear), and Ultra Light Down (packable down jackets and vests).
UNIQLO's design approach focuses on simplicity, quality fabrics, and versatility rather than seasonal trends. Collaborations with designers and artists (such as the UT graphic T-shirt series) add variety while maintaining the core basics-focused identity.
What's available
What UNIQLO sells.
UNIQLO covers a range of categories for everyday and special use.
AIRism
Moisture-wicking, breathable innerwear and casual tops for warm weather or active use.
Ultra Light Down
Lightweight, packable down jackets, vests, and coats suitable for everyday wear and travel.
Everyday basics
T-shirts, Oxford shirts, chinos, knitwear, denim, and casual outerwear for men, women, and children.
Who is it for
Who shops UNIQLO.
UNIQLO is popular with people who value functional, durable everyday basics over fashion trends, travelers who want lightweight and packable clothing, and shoppers looking for quality thermal wear (HEATTECH) or moisture-wicking innerwear (AIRism). Its clean, minimal aesthetic also appeals to shoppers who want versatile pieces that pair easily with other items.
Getting started
How to shop UNIQLO.
Visit uniqlo.com/us or a UNIQLO store in your city. The website is organized by men, women, kids, and baby sections.
Use the fabric technology categories (HEATTECH, AIRism, Ultra Light Down) to find functional essentials quickly. These are some of UNIQLO's most popular year-round items.
UNIQLO offers free returns within 30 days for unworn items in original condition. In-store returns are available at any U.S. UNIQLO location.
Check the Limited Offers section on uniqlo.com for rotating discounts on specific items. Sale prices often apply to the current season's basics and outerwear.
Common questions
Frequently asked questions about UNIQLO.
What is HEATTECH?
HEATTECH is UNIQLO's thermal innerwear technology. The fabric converts moisture from the body into heat, helping to retain warmth. It comes in three heat levels: HEATTECH (standard), HEATTECH Extra Warm, and HEATTECH Ultra Warm. HEATTECH items are available as crew-neck T-shirts, V-neck T-shirts, leggings, tights, and socks.
Are UNIQLO clothes true to size?
UNIQLO sizing is generally consistent, but it follows Japanese sizing standards, which can run slightly smaller than some U.S. brands. UNIQLO provides a detailed size chart with body measurements for each product. Many U.S. shoppers find sizing up by one size works well, though this varies by product category.
Does UNIQLO ship across the U.S.?
Yes. UNIQLO ships to all U.S. states through uniqlo.com/us. Standard shipping has a minimum order threshold for free delivery. UNIQLO store locations are primarily in major metropolitan areas, but online shopping is available nationwide.
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Information source: UNIQLO's official U.S. website and product pages. Last verified June 2026.
US Living Tips is an independent directory and is not affiliated with or endorsed by UNIQLO.