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- 1.5 times warmer than our regular 'HEATTECH'. *Based on CLO values, which indicate the thermal insulation of clothing. Comparison with standard 'HEATTECH'. <br>- Soft 100% SUPIMA® cotton on the inside. *Standard cotton, acrylic, and other textiles on the outside. <br>- High-performance fabric with Heat of Absorption, HEAT RETENTION, odor control, and moisture-wicking comfort features. <br>- Featuring Ultra Stretch for freedom of movement and easy layering. <br>- Classic crew neck. <br>- Ideal as innerwear or as a layering piece.

Save on HEATTECH Cotton Crew Neck Long-Sleeve T-Shirt (Extra Warm) with a Uniqlo promo code

Checkmate is a savings app with over one million users that have saved $$$ on brands like Uniqlo.

The Checkmate extension automatically applies Uniqlo discount codes, Uniqlo coupons and more to give you discounts on products like HEATTECH Cotton Crew Neck Long-Sleeve T-Shirt (Extra Warm).