Our Elevated Pet Cots protect pets from uncomfortable cold, hot, damp, and uneven surfaces. Lightweight cots allow air to circulate beneath dog for a healthier, more comfortable rest. Provides comfortable support for arthritic or geriatric dogs. Spring locks on each durable cot allow assembly and disassembly in seconds without tools, making it the perfect go-anywhere bed for travel and camping. Fabric is heavy-duty polyester oxford, water resistant, and is UV-resistant deep green polyester. Cover is removable for cleaning. Frame is constructed of powder-coated, rust-resistant steel. Velcro® along sides allows bed to be stretched or relaxed for customized tension. Large size has a center leg and X-Large size has two center legs for added support.