One roll-top main compartment that seals just like a typical roll-top dry bag; plus one external pocket with a water resistant zipper</br>Main compartment has a Class 3 waterproof rating and the zippered front pocket only has a Class 2 rating</br>The waist belt can be removed completely if you want to attach this compact pack to your own belt -- or just strap it to the side of your pack</br>RF welded construction of pvc coated nylon</br>Expandable Bottle Holder</br></br>Product Description</br></br>This waterproof fanny pack waist pack from OverBoard features one roll-top main compartment that seals just like a typical roll-top dry bag; plus one external pocket with a water resistant zipper. The main compartment has a Class 3 waterproof rating and the zippered front pocket only has a Class 2 rating. After rolling the top 2 or 3 times; simply buckle and cinch the side straps. The adjustable dry-fit mesh waist belt will fit waists up to 49 inches; but the waist belt can be removed completely if you want to attach this compact pack to your own belt - or just strap it to the side of your pack. Main compartment size closed 7.5-Inch W 5.5-Inch H x 2.5-Inch D Main compartment capacity 120 cubic Inch 2-Liters, Zipper pocket size 6in x 4in</br><br/>http://www.amazon.com/gp/product/B002IQY2DA