Catalyst Cryohelmet XL Migraine Relief Cap Neoprene, proprietary UltraCool synthetic fabric Made in the USA and Imported Patented technology keeps the helmet colder longer than regular ice or gel packs CryoMax strips are re-positionable for a custom fit All fabric and neoprene surfaces are treated with the Aegis Microbe Shield (Kills MRSA bacteria 99.999%) All parts are machine washable, line dry Use of the Cryo-Helmet is not a substitute for seeking proper medical attention