Product Size: l:37*26cm,xl:42*29cm Product Fabric: 70% Polyester Polyester/30% eco-friendly PVC (6P not included), lining: 100% polyester polyester fiber, filler: 100% PE foam. ❤mesh ventilation and visible design for storage of mesh bags.--Window ventilation, visible, so that your pet free to breathe and relax. Compression top entry allows easy access. Mesh pockets Help store belts, whistles, water, snacks, treats and other essentials. Adjustable belts and internal pull ropes--adjustable padded straps help relieve the burden. The retractable belt with buckle keeps the backpack stable. The buckle's inner cord prevents pets from jumping out or hurting themselves.