L-40 Midweight Stabilizer PDF Download 40 Legacy Midweight Stabilizer is a mid- to heavyweight sew-in stabilizer for firm, crisp support. It is great for hat brims, tote bags, and needlecraft backings. White 100% Polyester 51cm by-the-metre width Mid- to heavyweight sew-in stabilizer Sewing machine safe Machine wash warm. Tumble dry medium or dry clean. Find this and other quality Legacy products at your local Spotlight Store.