Quest Day Pack Water resistant backing ensures your belongings stay dry Outer shell is constructed from durable ripstop Comfortable airmesh backing with foam padding Six points of adjustability to prevent shifting, providing the perfect fit Panniers are easily removed without taking off the harness SIZE GIRTH WEIGHT VOLUME M 20'' - 30'' 25 - 45 lbs 2.5 L L 24'' - 36'' 45 - 75 lbs 3 L XL 26'' - 42'' 70 - 120 lbs 4 L