The Doggyhut S-Line XL Pet Bicycle Trailer & Stroller 2 in1 is a great way to maintain an active lifestyle with your pet. If you want to get in a bike ride, but your pet isn't up to it, you can still take them along. Easy conversion between trailer & stroller. It could be used as a training crate at home or pet car seat in the car Our design features an extra-wide wheelbase and a lower center-of-gravity to provide outstanding ride stability and easier access for pets getting in and out of the cabin. Full suspension system alleviates bumps and jostles on any terrain.The front door on the trailer includes a zippered, mesh screen layer plus a zippered, clear vinyl layer to block wind and weather. The zipped sunroof on the top provides ample airflow and room for pets to peek their heads out and look around. An optional washable pet mat (sold separately) keeps pets comfortable on long rides Assembles quickly and folds down for easy storage and transport. NO PETS LEAVE BEHIND!