Wells Lamont Work Gloves, Insulated Split Cowhide, Large (1195L) Leather: 100% Cowhide. Lining: 100% 3M Thinsulate (100% polyester) Imported Protect your hands while you're hard at work. Split cowhide leather has high abrasion resistance and durability. Insulated with 100 gram Thinsulate to keep hands warm. Keystone thumb design provides added flexibility and the reinforced palm patch offers extra grip. Wells Lamont - Stubborn About Quality since 1907.