SIZED TO FIT – We designed the outpost elite frame bags to cleanly fit a variety of frame sizes by producing 4 separate sizes that will fit most of bicycle frames: Small, Medium Short, Medium Tall and Large EXTERNAL POCKETS – The frame bags feature two external pockets with drain holes for when things get damp. Or keep your map/route close at hand HOSE PORT – The outpost elite frame bags feature a hose port to allow for the storage of a water reservoir and/or a cache battery to get dense heavy products to the lowest center of gravity WATERPROOF ZIPPERS – Keep the outside, outside, and your gear dry. The outpost elite frame bag is constructed of weatherproof materials and features welded seams and waterproof zippers ORGANIZATION – We carefully consider what is put in each of our bags and tailor the compartments, pockets and other features to make sure there is a perfect place for everything