Fly Materials Umpqua Stretch Floss 2 items USED ① Yellow ② Olive Silicone rubber material with excellent elasticity. Flat and elastic, it allows for the creation of flat bodies, and by stretching and wrapping it, it can be used for sizes from #8 to midge. It is ideal not only for body materials but also for rubber legs for terrestrials and hoppers. Please refrain from purchasing if you are sensitive to used items. Thank you.