The HoundAbout Pet Bicycle Trailer is a great way to maintain an active lifestyle with your pet. Leashing your pet to a bicycle can create safety concerns in the HoundAbout Trailer solves that problem and your pet will love the ride. Itfts also great for older pets or those with joint problems. Product features: Large size suitable for pets up to 110 lbs Medium size suitable for pets up to 50 lbs Great for older pets or those with joint problems Unique design sits lower for easier entry and exit for pets Wide wheel base provides more stable ride Constructed from rugged 600d polyester with waterproof floorboard, with the option of steel or aluminum. Features a front door with waterproof layer and mesh screen layer, a rear door with mesh screen; plus a sunroof. Multiple pockets to hold water bottle, personal effects, plus leashes, treats, poopy bags, etc. Removable, washable cushion Adjustable safety leash keeps pets secure while riding Includes universal bicycle hitch Assembles quickly and folds down easily for storage.