If you can't decide on a colour, Onyx is the answer — Ultimate Guard's darkest Boulder deck box paired with 100 matching Black Cortex sleeves. It hides fingerprints and shuffle-wear better than any bright colourway, and it goes with literally any deck, any playmat, any table. The safe pick that never looks like a compromise.
What's in the box
- Ultimate Guard Boulder 100+ deck box, Clear Onyx, soft-touch finish
- 100x Cortex sleeves, standard size (66 x 91mm), Black
- Case holds 100 double-sleeved cards, or up to 120 single-sleeved
Why it's good
- Glossy black Cortex sleeves keep card backs fully opaque at the table
- Soft-touch Boulder case is durable enough for weekly shop nights
Whatever you're playing — Magic, Pokémon, Lorcana, One Piece — black sleeves and a black box never clash with it.
One box, 100 sleeves, zero decisions to make. See every other colourway in our Ultimate Guard collection, or browse deck boxes on their own.
