One size fit most with adjustable waist straps and shoulder straps. Two water-resistant pockets with taped seams and splash-proof quality zippers 3 Large Backpack cargo pockets Four large interior mesh pockets on front! Fly Fishing experts love this backpack chest pack combo, keeps all your needs at your finger tips to eliminate trips back to the river bank or shore. Lightweight and mobile, our heavy duty polyester wading pack has an expandable main compartment as well as 3 extra zippered pockets plus a detachable chest pack with neck strap. The chest pack has 2 compartments with inner pockets. 19" x 13"