Felt fiber pad is designed for larger rugs on hard surfaces. It is made from synthetic fibers and adds comfort and cushion to your rug. It does not have any non-slip treatment and works the best with heavier rugs or rugs, held in place by furniture. We recommend to trim your pad about 1.5 inches short all the way around, or we can custom cut it (for free!) to suit your specific rug size - just ask us!