Lone Peak Swayback Bicycle Rear Rack Pack Bag Made in the USA since 1979, Lone Peak uses super-durable, water resistant 1000 D Textured Nylon Premium hi-density foam in sides and bottom for stability, aerodynamic shape and gear protection 1 large main zippered compartment, 2 zippered side compartments, sealed with weatherproof zippers. Extra-long 4-point strap and quick-release buckle attachment system for a universal, secure fit Dimensions: 15 L x 4.5 W (bottom), 9 W (at filled pockets), 3.5 H (front/rear), 7 H (middle)