DeWitt Straw TackSak is a sack of straw seeding mulch designed to stop erosion and speed up germination. TackSak is made of finely processed straw, cut twice and processed with a bonding agent that gives straw a tackiness which holds it together and protects grass seed from heavy washout, runoff and wind. TackSak conserves water, naturally biodegrades and is safe for pets and children. It also makes great bedding for livestock. Easy to use, handle and clean up. Covers up to 500 sq. feet.