The Seattle Sports Explorer Dry Bags are Ideal for All-Outdoor Adventures, from Camping to White Water Rafting, Bird Watching to Biking, these Bags Go-the-Distance. Explorer Dry Bags are constructed with 19oz (538.6g) Vinyl-Coated Nylon with a New Extended Heavy-Duty Abrasion Resistant Wrap Bottom. The Dry Bags have an Easy-to-Load Round Bottom Design and a Waterproof 3-Roll-Down Top Closure with a Squeeze-Style” Side-Release Buckle. When the Buckle is Snapped-Together it Functions as a Carry-Handle. The Bags are available in Multiple-Colors and Sizes. Recommended Uses by Size are as follows: Large Bags Multi-Day Trips and Bigger Items like Clothing, Camping Stove, Boots, Parkas, Sleeping Bags, or Food. Medium Bags Day Trip Needs and Smaller-Items like First Aid Kit, Flares, Books, Tools, or Snacks. Small Bags are perfect for Valuables like Passport, Watch, Wallet, Purse, Matches, Money, Flashlight, etc. Each Bag has the following Dimensions, Volumes and Weight when empty: X-Small (H x DIA) 10″ x 6.75″ (25.4cm x 17cm) with 305 cubic inches (5 liters) of volume and weighs 6.4oz (181.4g) Small (H x DIA) 13.5″ x 7.75″ (34.3cm x 19.7cm) with 610.24 cubic inches (10 liters) of volume and weighs 6.4oz (181.4g) Medium (H x DIA) 20″ x 9.5″ (50.8cm x 24cm) with 1,281.5 cubic inches (21 liters) of volume and weighs 17.6oz (499g) Large (H x DIA) 24″ x 11.5″ (61cm x 29.2cm) with 2,441 cubic inches (41 liters) of volume and weighs