There is nothing dizzying about the Recycled Plastic Dog Park Play Equipment. Energized pups will stay entertained for hours as they go through this item again and again. The structure will provide different challenges for different sized dogs. Larger dogs they will have to practice their agility as they move their bodies quickly but carefully around the curve, twisting their body to make it from one end to the next. Smaller dogs will have an easier time going through but will still face their own challenges as they climb into the slightly elevated entrance and use their balance to get to the other end, fighting against the gravity that the curve brings. The posts are made of high-density polyethylene (HDPE) that has been recycled. It also includes an anti-static roto-molded plastic tube to prevent hairs and fur from sticking to it. The Recycled Plastic Dog Park Play Equipment is overall easy to clean and will stay looking good for years to come.