These 4 x 4 nonwoven sponges can be used for several applications at home and in health care facilities. They are suitable for cleaning and wounds, and for prepping and scrubbing applications. These non-woven sponges are non-sterile. They are designed to resist fraying and produce less residual lint, for cleaner and neater usage. They are made of a polyester and rayon blend, giving the wearer a soft and comfortable feel against the skin. The 4-ply construction of these sponges allows them to absorb lots of blood and other fluids. This keeps the area around a wound clean and comfortable. In fact, they are more absorbent than traditional woven gauze. They are intended for single-use applications.