It's a rucksack. Quoted from the following site: Width 35cm x Height 45cm BALLISTICS x TheArth special order knapsack with a GRIND LODGE screen print! *Because the silkscreen is all done by hand, there may be some slight errors in the print position. 2-WAY specification: rucksack type and tote bag type! Lightweight and can be folded compactly for carrying. Rucksack Backpack Tote bag DEVISE WORKS Device Works asimocrafts Asimocrafts Asimocrafts NATAL DESIGN ballistics Ballistics Ballistics Mountain Research Snow Peak Helinox thearth oldmountain Old Mountain somabito Somabito BYCRUISE Bycruise sanzokumountain Sanzokumountain neru design works NATAL DESIGN Old Mountain Camp Outdoor Mountain Research 38 explore halftrack products h&o H&O thearth Thearth Makuo M16 LOCKFIELD EQUIPMENT Lockfield GRIND LODGE Grind Lodge Grind Lodge inavance