The Bugaboo Donkey 5 Duo extension set includes the essential hardware parts, seat fabric and sun canopy fabric, ideal for transforming your Bugaboo Donkey 5 Mono (sold separately) into a stroller for two children of different ages. You can combine this duo extension set with the complete Bugaboo Donkey 5 Mono stroller (sold separately) to create a double stroller that's ready for all your family adventures. Fabrics: 100% polyester Filling: 100% polyester Faux leather grips: 100% PU Mattress cover: 100% polyamide All fabrics are machine washable at 30°C/ 86°F the faux leather grips can be cleaned with a damp cloth always consult the washing label for the exact instructions