Techniche Hybrid Elite Sport Cooling Vest, Gender: Mens/Unisex, Primary Color: Blue, Size: XL, Distinct Name: Blue 4531BLXL Front zipper with mesh ventilation panels and scoop neck Comfortable, quilted nylon outer with Hyperkewl cooling fabric inner, water-repellent nylon liner, and black cotton-poly elastic trim Hybrid cooling solution for ultimate relief Evaporative cooling Hyperkewl cooling fabric provides 5-10 hours of cooling relief per soaking; CoolPax PCM inserts maintain a comfortable 59deg. F for up to three hours Include one set of CoolPax PCM cooling inserts, and one vest and one cooler bag