Kinco Unlined Grain Pigskin Gloves with Hi-Vis Green Mesh Back & Scotchlite Hi-Vis Green nylon mesh back for those hot summer days 3M Scotchlite reflective material Unlined Quality Grain Pigskin palm, thumb, and fingernails Keystone Thumb - A keystone thumb provides added reinforcement and padding at the point on the glove that receives the most wear. It is a double thickness of leather that overlaps onto the base of the thumb. Pigskin dries Soft & Supple after getting wet