Dragon Shield Japanese Matte Dual sleeves have a clear front and a textured matte back. They are fully opaque, with a black interior, which makes for an elegant backdrop for black bordered cards.
The sturdy cardboard box fits 40+ single sleeved cards or 35+ double sleeved cards measuring up to 59 x 86mm (2 5/16 x 3 3/8"e;), for games like Yu-Gi-Oh! and Cardfight!! Vanguard.  Now at Daves Rare Finds.