Fully lined with Non Slip material for safe and secure fit. Easy Installation: Do not need tools,stretches to fit standard steering wheels 14-15" in diameter. Protect your original steering wheel from wear and tear?protect your hands from burning hot steering wheels in summer and ice cold ones in winter. Function: Breathability, Keep Dry, Skidproof, Luxury ergonomic design, can use four seasons. Increased Safety :A better grip on the wheel gives your more control on the road.