VERTU CCAV-S Cycling Bike Bicycle Hollow Out Seat Saddle - Black 1 Pcs Spider design and ergonomics full hollow make MTB bicycle saddle fashion and comfortable. Material is super light, aging resistant , suit for long journey cycling. The middle hollow design can reduce 40% pressure of prostate, pubis and ischium. Full hollow spider design make it ventilate. 100% comfortable made it competitive. Material: Plastic + Steel, Size: 28 x 13 x 6.3 cm, Weight: 300 g, Color: Black.