*Returns not accepted on any opened, used, or defective product. Contact manufacturer customer service directly for defective products/parts. From Bugaboo, this extension stroller set features: Recommended use: From ages 6 months to 4 years and up to 50 lb. Converts Bugaboo Donkey 5 Mono stroller (sold separately) into a double stroller Extension set can be set up for different child age/size  Five-point harness Water-resistant sun canopy/rain cover seat/bassinet base frame carry handle Lightweight & durable Assembly required; easy installation, just click and go Aluminum/polyester Imported.