Shadowproof Liner is a fragile fabric. It can be either an 81% Nylon/19% Spandex blend or a 78% Poly/22% Spandex blend. Shadowproof Liner is not available in piping or binding. Shadowproof Liner may be required when Mesh is on the main bodice of a garment. It is always optional underneath Mesh on sleeves. Individual Consumers may select up to 5 free swatches. Dealers, Retailers, Schools & Clubs may select up to 20. Additional quantities will be charged at 25 cents each.