Ultimate Guard's Boulder 80+ is a durable and reliable deck box featuring our popular soft-touch surface. Despite its secure closure, the Boulder 40+ is easy and convenient to open and holds 40 double-sleeved cards in Ultimate Guard sleeves* from trading card games like Magic: The Gathering, Pokémon, Lorcana, Flesh and Blood, Yu-Gi-Oh!, Riftbound, or One Piece. Designed to combine with all Ultimate Guard mass storage boxes, Boulders fit especially well into Arkhive, Superhive, and Flip'n'Tray boxes.