USD decided to make a high quality knee pad specifically designed for rollerbladers. Their adjustable knee pads are definitely good for those of you doing airs on ramps and transition because they have good thick padding and a hard plastic plate for you to slide out on.The USD knee pads also feature a neoprene backing with adjustable velcro straps and pull strap. Lastly you can remove the front plates if you don't want them on because they are attached with good quality velcro.PLEASE NOTE THE L/XL HAS THE USD LOGO ON THE KNEE CAP