Croozer 525 Double Child Bicycle Trailer (Red/Silver/Grey) 2-in-1 child carrier quickly converts from double stroller with a 100 lb weight capacity, to bike trailer with included accessories Patented ultra-quick folding system for easy assembly and storage Attaches securely to any adult bike via hitch arm and two-part axle attachment Cockpit is safe and comfortable, with front and rear bumpers, padded five-point harnesses, padded headrests, and low center of gravity Weather cover keeps out rain and sun, and mesh sides ensure ventilation