Fizik antares r3 open saddlethe antares r3 open saddle from fizik offers you a neutral profile with a central cut out that prevents discomfort and numbness on sensitive areas. It has a supportive, yet flexible shell that helps you stay comfortable as your finding your power sweet spot.spine concept evothis saddle is categorised as a “chameleon” type within fizik's spine concept system, which means it's ideal for riders with a medium amount of spine flexibility and those who have a minimal amount of pelvis rotation when pedalling.advanced constructionthe antares r3 open has kiumrails that are lightweight and strong and its nylon base is reinforced with carbon fibre. This construction gives you a platform that provides outstanding durability and pedalling efficiency. Finishing off this saddle is fizik's comfort core foam and a tough microtex cover.†don't know if you're a bull, chameleon, or snake? No problem! You can download fizik's handy spine concept evo app and test your flexibility. Simply search for spine concept evo in the itunes app store or google playstore and download it to your device.for assistance on how to use the app, click here.features  cover microtex  shell carbon reinforced nylon  rail 7mm kium  padding comfort core foam  open central cutaway  integrated clip system compatible  dimensions regular 276x141mm large276x153mm  weight regular215g large 220gbuy fizik components from chain reaction cycles, the world's largest online bike store.