Color-coded hem to identify size CV Grade Grain Cowhide Keystone Thumb From wranglin' to buildin', these gloves are tough for the job! Cowhide is the most commonly used leather due to availability. Characteristics include a good balance between abrasion resistance, dexterity, durability and comfort. The 3215 drivers gloves feature; unlined CV Grade cow grain leather, shirred elastic back, cotton hemmed, and a keystone thumb pattern.