New Bikepacking seat bag! The Seatpacker 15 with quick release rack. Completely waterproof with sealed liner, easily slides on and off for easy packing and handling. Seatpacker rack totally eliminates side to side movement (Tail Wag). Plus it works with dropper posts!! Slim front design and reinforced front panels eliminate thigh rub. Needs a minimum clearance of 8" from seat rails to top of tire.