35L 55L 85L: More capacity options for your various trips. The 35 Liter dry bag is great for two to three days trip on the water. The 55 Liter dry bag has more capacity which can be great to pack one weeks' worth of clothes and gears, and the 85L bag can pack a whole families' trip items for one week. And the backpack is waterproof so you don't need to worry about the bad weathers during your trip.
ROLL TOP CLOSURE SYSTEM: You just need roll the top of the dry bag 3-4 turns and clip buckles well, and reinforce the strip, which is simple and reliable. Now you can go for your adventure as the professional rucksack style dry bag backpack is waterproof totally and air tight and dust resistant and it can make sure water stay out and keep your gear and items dry and safe inside
MULTIPLE USE: The waterproof dry bag can not only be the best storage backpack for outdoor adventures, (kayaking, hiking, floating, camping, canoeing, boating and so on), but also as a carry-on 35L bag for business trip and daily use backpack, such as cle commute to work.