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- 'HEATTECH Extra Warm' is 1.5 times warmer than our regular 'HEATTECH'. *Based on CLO values, which indicate the thermal insulation of clothing. Comparison with standard 'HEATTECH'. <br>- 100% SUPIMA® cotton lining is gentle on the skin. *The outer material is made with standard cotton, acrylic, and other textiles. <br>- With Heat of Absorption, HEAT RETENTION, deodorizing, moisture-wicking, soft texture, and shape-retaining features. <br>- Ultra Stretch for freedom of movement and easy layering. <br>- Cozy brushed fabric. <br>- Versatile crew neck design. <br>- Stays hidden under outer layers.

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

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