I only used this once for my dog and never used it again because he is now a service animal and sits on my to fly. Materials Carrier: Neoprene Outer: 90% Polyester / 10% Spandex Lining: 100% Polyester Mesh Panels: 100% Polyester Travel Mat: Neoprene Base: 90% Polyester / 10% Spandex Lining: 100% Polyester Binding: 100% Polyester Product Dimensions & Specs Length: 17.5” (45 cm) Width: 11” (28 cm) Height: 10” (25 cm) Weight: 3.750 lbs, 1.726 kg Recommended for use with dogs up to 16 lbs