Large capacity seat bag specifically designed for bikepackers wanting a streamlined way to carry gear without the need for a rear rackReinforced, anti-slip/scratch fabric protects the saddle while the advanced mounting system enables convenient and secure mounting to seatpost and saddle railsEasy access waterproof carry bag and built-in air release purge valve keeps bag compact and dry while youre on your next adventureWaterproof bag is removable from main chassis while still attached to the bikeRear light loop allows the attachment of safety lights for improved visibilityAvailable in 2 sizes and 2 colorsAdjustable Straps18.1x9.4x8.7610 c.i.GreenXX-Large (301-500 c.i.)