Beck's underpads are reusable, and designed to fully protect bed linen, mattresses, or any surface from moisture and staining. "Birdseye" refers to the all-over pattern for fabric used here which consists of a small diamond with a center dot. - Designed to protect your bed linen, mattress or virtually any other surface from moisture and staining. 100% cotton birdseye face cloth with a knitted vinyl barrier for comfort. Quilted to a blended poly/rayon heavyweight soaker for leakage defense.