The Game Ready Cryo Cap with ATX can be used to treat head injuries and provide pain relief with cold compression therapy. It combines active cold therapy and cold compression for enhanced surface contact. The cap is designed to be fully adjustable, fitting any size head up to 28" in circumference. This cap features a low-profile, ergonomic design combines cold therapy with targeted pneumatic compression that gently conforms cap to cranium for improved surface contact and more efficient cooling. It can easily be put on or removed, and has a soft chin strap to help it stay secure on the head. The Cryo Cap is only compatible with the Game Ready Pro 2.1 System. One size fits all.