Our Long Sleeve Zip Mock Neck features our patented Icefil(R) technology fabric. It works by converting sweat to refrigerant, cooling your skin 3 to 5 degrees, allowing you to be cool, comfortable and dry on the hottest humid days. This garment also has built-in UPF 50 sun protection, moisture-wicking, and anti-microbial properties. This style has a mesh underarm panel promoting additional comfort and breathability. Wear the Long Sleeve Zip Mock Neck to all athleisure activities! Fit & Design: Long sleeve Mock neck 1/4 zip design Ultra-smooth and lightweight to the touch Mesh under sleeves facilitate additional airflow to keep you cool Technology: UPF 50+ offers superior sun protection Icefil(R) technology reduces body temperature by up to 5 degrees, so you stay comfortable on hot humid days Moisture-wicking, fast drying fabric keeps you comfortable Antimicrobial for odor protection Additional Details: Machine wash cold with similar colors, Do not bleach, Do not use fabric softener, Tumble dry low, Cool iron if needed, Do not dry clean