quality - -friendly clear silicone and high density milk foam. Soft and durable. Effectively shock and reduce .Extra Wide Bike Cover: The oversized bike cover comes with extra padding gel, making it perfect for your prostate and tailbone relief. Super soft bike saddle helps you say goodbye to and enjoy cycling now.[Anti-] This bicycle cushion adopts a specially designed non- saddle cover and drawstring design, which can effectively prevent the bicycle from sliding.Center Hollow Pressure Relief Design: pads are aerodynamically hollow and breathable to not only relieve pressure, also and comfort on long rides.EASY TO INSTALL - The bike cover comes with non- leather, drawstring and 2 extra straps to keep the bike cover on the .Wide Bike for Wide Bikes - Bike Dimensions: 11.8 x 10.6 x 2 inches (L x W x H). Weighs 17 ounces for bike widths in the 8.5-10 inches range. Suitable for mountain bikes, spin bikes, exercise bikes, road bikes, cruisers, electric bikes.Colour: BlackMaterial: Silicone+SpongePackage Contents:1 * Bicycle cushionOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.