Superboot Backpack, cursed item. Grants +5000 inventory space, damages the player's spine over time, VA will not treat injuries inflicted by use. : r/ItemShop
Season of the Cursed" Backpack for Sale by GimmicsRipoff | Redbubble
Curse Back to Battle Printed School Bag Student Leisure Computer Bag Travel Bag Backpack | Fruugo ZA