Hestra XCR Mitt Glove Leather 70% Leather, 30% Synthetic Gore-Tex XCR waterproof breathable insert Hestra Handcuffs Grease the leather regularly and it will resist moisture, wear and tear better. Use a polishing cloth and rub in the grease until the leather is saturated. Do this in the evening and the grease is absorbed during the night. Avoid silicon impregnation. China