2-Pocket Eclipse Royal Purple Pro-Binder - Rules of Play says:

2-pocket Royal Purple PRO-Binder with embossed middle black web material gives cards a classic framed look. Side loading pocket design to prevent cards from easily falling out. Elastic strap holds the binder shut when not in use. All materials made from archival-safe, acid-free non-PVC material. Holds 80 cards in Ultra Pro Deck Protector sleeves.