Silicone treated fabrics have been notoriously difficult to patch with tape or sticker type solutions, as the slippery surface seems to shrug off everything except for a needle and some thread. Gear Aid has, however, finally managed to make a reliable solution to this use. These patches adhere to silicone treated fabrics (silnylon, silpoly), nylon, polyester, fleece, vinyl, rubber and clean, unoiled leather. You can also use the patch as a pre-emptive reinforcement in an area of a piece of apparel or gear you see wearing down faster than usual. - Patch measurement: 7.6 x 12.7 cm - Package contains two patches - Main material: 40 denier siliconized ripstop Nylon - Machine washable