Amazon.com: Two Wheel Gear - 4 in 1 Dayliner Box Bag (20 Liter) - Water Resistant Rolltop for Bike Handlebars, Rack Trunk or Basket with Shoulder Strap (Graphite Grey) : Sports & Outdoors
How Big is a 20 Liter Backpack? Visual 20 Liter Backpack Size Guide | Backpackies
DAY USE DRY BAG 20L - Waterproof Surf Travel Backpack – Creatures of Leisure USA