floating' backpack bounces up-and-down to reduce stress on your back
HoverGlide | Floating Backpack | United States | Home
20L Compact Floating Backpack, Roll Top Dry Sack with Waterproof Phone Case for Kayaking, Beach, Rafting, Boating, Hiking, Camping and Fishing Bag - China Dry Bag and Waterproof Backpack price | Made-in-China.com
HoverGlide: World's First Floating Backpack by Lightning Packs — Kickstarter