10L 20L 30L 40L Swimming PVC Pack Dry Bag Outdoor Sports Waterproof Shoulder Bags for Trekking Drifting Rafting Surfing Pool Beach  Kayak Boating Pack Backpack [Material]: PVC [Color]: Yellow Black and Green [Size]: 10L :49*20cm(L*H) single shoulder strap 20L :59*24cm(L*H) 30L :63*28 cm(L*H) 40L :78*28 cm(L*H) [Feature]: Leisure Fashion, Durable,Waterproof, Waterproof,detachable shoulder strap,top rolling [Application]: Trekking Drifting Rafting Surfing Boating Note: ​ 1.Manual measuring, please allow slightly measurement error. ​ 2.Due to the difference between different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture. Note: 10L is single shoulder strap 20L 30L & 40L are double shoulder straps