The Mares Cruise Tubular Dry Bags come in four sizes to meet all your dry bag needs. The closing system is very easy and fast: simply roll up the top of the sack, close it with the squeeze-style" side-release buckle clip and that's it. Made from ultra-heavy-duty 500D Tarpaulin with PVC reinforcements and thermo-welded stitching these bags ensure a waterproof seal, as well as resistance to scratches and abrasions. All models have an adjustable, removable shoulder strap with 360° swivel gate clip snaps and allow the roll-top closure to be used as a top grab handle. The bags durable 500D tarpaulin fabric is SVHC-free. Bags are color coded by size and available in a 5L, 10L, 25L and 35L capacities. The T5 has a 305 cu. in. (5 liter) volume and is a clear white in color. The T10 has a 610.25 cu. in. volume and is red in color. The T25 has a volume of 1,526 cu. in. volume and is blue in color and the T35 has a volume of 2,136 cu. in. and is silver in color. So, if dry storage big and small is what you need the Mares Cruise Tubular Dry Bags got you covered.