TIOGA UNDERCOVER STRATUM BLACKAn updated version of Tioga`s Spyder saddles featuring a top layer of Bio X Ergo Foam that covers the traditional Spyder`s shock absorbing web like structure Flexile web structure conforms to you when seated, flexes when soaking up energy from bumps, and remains pliable to continually absorb shock An open frame with underside structural braces controls the rate of compression to offer seated support and limit excessive sag Underside support structures