I guess its a chance we take when ordering online. but its plastic. Pedaling backward gives you the smooth, natural flow of walking. Apparently the Sennheiser Momentem 2. The most important thing is charge though . I wouldve liked it more if the bottom was reinforced with some type of cardboard to keep it flat but its not needed. And Im picky. Ive used the polisher a few times and works well. If it would get any warmer it would burn the towel. These will be my summer go-to footwear for knocking around the yard or hitting the water.