All BurnGuard® Products are equipped with an Effective Liquid & Vapor Barrier which protects the wearer from burns from hot liquid, grease and steam. Intermitten use up to 450 degrees. The Interchangeable Liner series provides additional sanitation and cost savings by allowing removal, cleaning and replacement of the liner alone, which is held in place with hook and loop fastener. Machine washable. NSF. Most popular style/shape of mitt and are ideal for all general purpose cooking. Nomex® with GussetGuardTM for added durability and dexterity. Made in USA. Caution: Do not use outer shell or liner alone. Replacement Liner Item # 4403