Ice Mat pillows (purified water with food-grade freezing agents) sewn into the wrap using sturdy, hook-engageable nylon fabric with an anti-microbial finish to safely control bacterial growth on the wrap. When frozen the ice pillows remain flexible to ensure a comfortable fit and excellent application of cold to injury site.The Foot & Ankle Wrap provides safe, comfortable compression while remaining dry. The wrap provides sufficient cold therapy for bumps, bruises, strains and sprains. The outside velvet loop fabric allows desired compression and fit for all sizes.