■ Leather glovesprotect against sparks, moderate heat, blows, chips and rough objects. ■ Aluminized glovesprovide reflective and insulating protection. against heat and require an insert made of synthetic materials to. protect against heat and cold. ■ Aramid fiber glovesprotect against heat and cold, are cut- and. abrasive-resistant and wear well. ■ Synthetic glovesof various materials offer protection against.