Wells Lamont Leather Work Gloves, Insulated Grain, Medium (1116M) Keep your hands comfortable and protected while you're working. Grain cowhide leather is durable and abrasion resistant - lined with 100 gram Thinsulate insulation. Gunn cut places seam at the natural crease of the hand for comfort while the Keystone thumb design provides flexibility. Wells Lamont - Stubborn About Quality since 1907.