GameGenic Blue Side Holder 80+
"With this casual product, players receive a smart and fast solution to store and organize their card decks. The Side Holder 80+ is a casual sideloading deck box that safely protects up to 80 double-sleeved cards. Its self-locking flap closure can be opened up to 180° thanks to the use of the innovative Cobra Neck technology on the back. A handy write-on strip allows for individual labeling. A Flex Card Divider is also included."
--From manufacture's website