Our Easy Step II Medium Pet Steps has an innovative incline of each step that allows your dog to put his entire body on each step which reduces the needed steps to climb with confidence eliminating stress and pain on your little friend. The carpet tread is machine washable, plus removes so easily. Stairs easily snaps together, no tools required. Perfect for senior dogs up to 150 pounds that may require extra assistance, due to some disabilities also those with hip and joint problems. Post-surgery dogs, and even cats really benefit from our Easy Step II Medium Pet Steps.