Dynarex Light Absorbent Disposable Underpads are latex-free with a cotton fluff-filled lining and feature a waterproof non-skid blue backing. These underpads are made in 3-layers. The top layer is Non-woven fabric, the middle layer is woodpulp confined in 2-paper layers and the bottom layer is PE film. It is sealed on all four sides to prevent leakage.