1.Extra Wide Replacement Saddles maximize the comfort of your ride, no matter where or how far you go. The cushioning, molding and suspension systems are designed to perform. These seats are ideal for upright and senior riders. 2. Bikeroo bicycle seats are constructed to hold up to heavy, regular usage. Whether you're commuting to and from work, or winding down in your own personal spin class, the reliability of your saddle will be the last thing on your mind. 3. Installation is easy with the included tools! Each Bikeroo seat comes with everything necessary to attach it to your bike: two hex keys, a multi-hole bicycle wrench, a seat adapter, and detailed easy to follow instructions. 4. Both the Indoor and Outdoor saddles measure 10.5" x 10.5". The Hybrid measures 11" x 7.5". All three seat models are standardized for a universal fit. Perfect for Peloton, NordicTrack, Trek, Giant, Cannondale, Schwinn, Mongoose, Sunlite, & more. 5. The memory foam cushion molds to and supports your individual curves. It's mounted on steel springs for bumpy rides (Outdoor & Hybrid), and elastomer for smooth rides (Indoor & Hybrid). The high quality faux leather makes Bikeroo seats vegan friendly. 6. The universal mount ensures that this bike saddle for both men and women will fit any city, MTB mountain, commuter, ebike, indoor stationary, or road bike. With standard rails, change out your old seat cushion for an upgraded, comfortable ride.