Funs 40L Water-resistant Outdoor Camping Hiking Rucksack Travel Daypack School Backpack (Blue) Capacity of 40L Material: Terylene, Nylon; Water-resistant, Stain-resistant Padded and breathable mesh back panel and shoulder straps offer cushioning comfort, while also promoting air circulation along your back and shoulders Multiple attachment for tools, trekking poles, camping gears, sleeping bags, tents, etc. Perfect for outdoor activities like hiking, climbing, camping, running, jogging, walking, cycling, fishing, travel, vacation, beach wear, can be also used as a student bag