Like the name implies, these strong, grippy patches can handle heavy-duty repairs. Ideal for mending sleeping pads, down jackets, tent flies, tarps, rain pants, and more. Clear adhesive doesn't leave sticky residue like duct tape can. Sticks to most surfaces, including nylon, polyester, and other synthetic fabrics Contains tough fabric and aggressive adhesive Washable patches, wait at least 24 hours after applying, and then wash your gear just like you normally would. Contains 19 patches of varying sizes: 6 x large hexagon (35 x 33mm), 6 small hexagons (20 x 19mm), 2 small diamonds (15 x 23mm), 2 x small octagon (33 x 71mm), 2 large octagons (120 x 33mm), and 1 x sheet 127 x 76mm)