Cotton,plush,polyester COTTON AND POLYESTER with 100% cotton top surface, 100% polyester piping and button panel, fitted bassinet sheet made to be soft and breathable for safety and comfort DESIGNED to fit snugly to Arm’s Reach bassinet mattress, as advised by all guidelines for infant safety HOOK-AND-LOOP TABS match to Arm’s Reach bedside sleeper bassinet mattress tabs COMPATIBLE WITH Arm’s Reach Mini Ezee, Cambria, and Clear-Vue bedside bassinet These fitted bassinet sheets are the ONLY official Arm’s Reach Co-Sleeper sheets, specifically designed for use with Arm's Reach Co-Sleeper Bedside Bassinets. They fit the Mini Ezee, Cambria, and Clear-Vue Co-Sleeper Bassinet mattress. Pediatric guidelines advise snugly-fitted sheets on all baby mattresses, and these soft, breathable sheets feature hook-and-loop fastening tabs to match the specified mattress tabs. Available in 100% cotton, 100% polyester plush, and print sheets with 100% cotton top layer with polyester bottom and piping. All sheets are fully machine washable. Full list of compatible models: Mini, Mini Arc, Mini Ezee, Mini Classic, Mini Convertible, Euro Mini, Clear-Vue, Angelica, Santa Barbara Toffee, Cambria, and Curved Mini.