Tent & tunnel can be used separately or together. Tunnel constructed of spring steel with nylon cover. Sturdy shock-corded poles for easy assembly. Tunnel will attach to side or back windows. Durable and washable polyethylene floor. "T" style door opening for easy access. Both are made of 70 Denier nylon. All nylon meets CPAI-84 flame retardant standards. Blue, red and yellow tent with blue tunnel. Size: 48" x 48 " x 42" High - Tunnel: 4' x 19" Dia.