Thanks to a unique seamless construction and roll top sealing system our backpack is 100 waterproof and suitable for quick submersion so you can take it out on the water perfect for water sports and all types of activities the yellow 30 litre overboard waterproof backpack protects your gear from water sand dirt and dust roll top 100 waterproof backpack class 3 ip66 floats safely if dropped in water protects contents from dust sand dirt and water high frequencyrsquo welded construction padd