New Pig polypropylene skin oil-only maintenance absorbent sock. When UV rays aren't a factor, use these these 95 percent recycled content socks for oil leaks and spills indoors. Designed for use indoors, these socks absorb a variety of oils, solvents, food-grade oils and other hydrocarbons, but not a drop of water. Economical design for general, daily use compared to socks for specialty applications. Tan color hides grime to stay on the job longer; discourages changeouts before sock is saturated. 95 percent recycled content is ideal when you want or need to purchase green products. Filler is a mixture of pre- and post-consumer hydrophobic newsprint. Note: not recommended for continuous outdoor use. Fluids absorbed: oil-based liquids but not water. Absorbency: up to 30 gallon per box. Composition: polypropylene skin and hydrophobic cellulose filler.