i-stay (Aisutei) • Type: 3-wheel caster 3-WAY carry bag suitable for stair climbing • Can be carried as a Boston bag • Can be carried on the back as a backpack • Can be pulled as a carry bag This is a multi-functional model that offers three ways to use it. Color: Black Size (approx.): 50 x 75 x 41 cm Approx. 150L Please note that there may be some errors. Although the capacity is not stated on the tag, I took a picture with two single winter futons inside, and there's still space for more. Unused, stored item. 3-wheel caster, 3-WAY (backpack, Boston bag, carry bag), large capacity, travel, camping, school trip