Veritas Skew Rebate Plane Sack Veritas offer high quality plane sacks that are silicone-treated knit cotton that resists moisture. Designed much like a tube sock with a drawstring closure, the sacks keep dust and dirt off the planes and help deter rust development. A tag on the outside of the sack lets you label the plane inside. Works best with permanent pen. Silicone-treated knit cotton that resists moisture Keeps dust and dirt off the planes and helps deter rust development Protection for expensive planes and other tools