Nathan Firestorm 2L Vest Equipped with a 2L bladder with quick release valve and organizer pocket with key ring clip inside upper back pocket Slide Adjustable chest strap for perfect placement and bounce free ride and Easy on and off with full side Adjustability. Helmet loops at upper side back of vest and a rear external shock cord for increased capacity Highly breathable wall mesh shoulder straps with reflective trims and a rear strobe clip for safety Fits up to 44 chest size