Product Description Cools the body using only water (no battery or ice packs required) Aqua Water Vest Item No.: AT101 (Aqua Water Vest) Color Code: 70 (Black) Size: L Material Material: 100% Nylon Core: 100% Polyester Side Mesh: 82% Polyester, 18% Polyurethane ・Cools with just water ・Cooling system using evaporative cooling ・Antibacterial treatment for clean use ・Cooling time up to 3 days (8-72 hours) *Varies depending on ambient temperature and airflow ・Machine washable ・Environmentally friendly, no batteries required ・Cool-to-the-touch nylon material ・Side stretch for unrestricted movement ・Perfect as an inner layer for fan-equipped clothing! Experience even more coolness.