Keep yourself cool this summer thanks to the Chill-Its Unisex Standard Phase Change Cooling Vest with Rechargeable Ice Packs. These phase change cooling packs are adjustable thanks to the hook and loop closures on the waist for flexible fit. Ideal for workers in pulp/paper, iron/steel, vulcanizing, foundries, etc. or for people running, biking, doing yard work, riding motorcycle and more. Each cooling vest pack maintains a constant 64-degree F temperature for up to 4 hours. Cooling vest packs maintain constant 64 degrees F temperature for up to 4 hours Packs reactivate in as little as 10 minutes Patented honeycomb ice pack design eliminates stiffness Phase change cooling packs are adjustable thanks to the hook and loop closures on the waist for flexible fit Made out of cotton for lasting durability and comfort Extended vest surface area enhances cooling power Ideal summer work vest for workers in pulp/paper, iron/steel, vulcanizing, foundries, etc. or for people running, biking, doing yard work, riding motorcycle and more Weight: S/M - 6 lb., L/XL - 9 lb. Cooling vest comes in two sizes ranging from S/M (32 in. - 40 in. / 81 cm - 102 cm) to L/XL (40 in. - 52 in. / 102 cm - 132 cm) Chill-Its Unisex Standard Phase Change Cooling Vest with Rechargeable Ice Packs