Ice Mat pillows (purified water with food-grade freezing agents) sewn into a sturdy hook-engageable nylon fabric with an anti-microbial finish to safely control bacterial growth on the wrap. It is universal in size. Pro-Kold wraps are ergonomically designed. Construction conforms anatomically and keeps Pro-Kold wraps cold for up to two hours without sweating or leaking. Pro-Kold products offer Cloth Tie contact closures that make the wraps simple to apply and eliminate the watery mess of regular ice.