Features & details 【Multiple Stairs Size to Choose】TWO-STEP: 15.7"L*16.5"W*11.8"H, THREE-STEP: 23.5"L*16"W*16"H, FOUR-STEP: 28"L*15"W*20"H. Compatible with most high beds, couch and sofa. 【Protect the Dog's Joints & Knees】35° scientific bevels of Mesa Lemon dog stairs can reduce your pet climbing legs' burden, and arc surface design is more friendly to pets with reduced mobility, protecting your dog's joints and lumbar vertebrae fully. 【Double Anti-Slip】Mesa Lemon dog stairs cover is made of WATERPROOF corduroy to increase more friction between your pet's paws and the steps than other fabrics. And the dog ramp has rubber dots on the bottom to keep the pet stairs in place by extra grip. 【High Density Foam】30D High-density, lightweight foam waterproof dog ramp can rebound rapidly and holds up to 60 lbs, which is stable and not easy to deform with good supportability, no worry about bumps and protect the safety of pets.