• iHEAT Compression Long Sleeve Mock Neck: Moisture-absorbing and heat-generating + Generates heat of +5°C or more through light absorption and heat generation. This product combines moisture-absorbing and heat-generating processing with polyester yarn that incorporates a light-absorbing and heat-generating material that converts sunlight into thermal energy. The double heat generation effect provides ample warmth. Furthermore, it quickly absorbs and dries sweat, making it comfortable and less prone to stuffiness. Features: UV cut rate of 95% or more, Ultraviolet Protection Factor "highest value UPF50+": Absorbent, quick-drying, and stretchable. ■ Color: Black There are no tags, but it has only been tried on.