Lightweight & multi-purpose, fully waterproof rucksack backpack for hiking, trekking, biking, gym/sports gear, commuting to work and as a day bag. 23 Liter / 1404 cu. in. Gear capacity + 7 Liter / 427 cu. in. extra capacity.  Dimensions are: 21.3” x 10.2” x 9.4" Volume up from 23 liters to 30 liters if you need to carry extra gear!