Cass Art Presentation Sleeves are made from 140mc medium-gauge recycled PVC, with black paper. Like all Cass products, they’ve been designed after consultation with artists and students and are made in collaboration with the best suppliers. Cass Art Presentation Sleeves have a non-stick surface and the holes are welded to make them extra-strong, so your portfolio stays looking smart and shows off your work to its best advantage.  Stocked in most of our UK stores. The A4 size is an online exclusive.