For dogs who ride in the backseat - the Waterproof Microfiber & Foam Safety Seat Extender expands the size of the backseat and helps prevent your dogs from falling into the footwell. Comfort - provides a larger more comfortable backseat for your dogs to lie on. Safety - increases safety on the road by reducing the risk that your dogs will fall into the footwell through sharp corners and quick stops. Cars and SUVs - sized to fit the backseat footwell in most cars and SUVs. (If you're tall and need the front seat pushed further back, or you have a vehicle with a smaller footwell, simply turn the Expander over so the narrow part of the Extender is facing up.) Microfiber, Waterproof Liner and High-Density Foam - uses durable heavy duty upholstery grade Microfiber cover fabric, solid foam high density foam and a waterproof breathable liner. Waterproof - the foam is encased in a waterproof /breathable liner preventing water, spills, accidents and smells from seeping into the foam. Easy Care Zip Off – the cover and liner can both be easily unzipped and removed for easy care machine wash and drying. Two Extenders – two extenders are needed to fill both backseat footwells. Easy Care - Machine wash and dry cover on gentle cool settings (do not dry clean). Fit - one size fits most cars and SUVs. 125 Lbs – Easily supports up to 125 lbs. Dimensions - 25” L x 12” D (the narrow Depth is 8” allowing the front seat to be pushed farther back) x 12” H. Pets - for Pet use only.