Polyester Eco-friendly Dyestuff OEKO-TEX Certification Material of 100% polyester blue gingham ribbon High denisty and smoothly surface Tolerance of width within 0.5mm Yarn-Dyed Before Woving 100% Polyester woven edge gingham ribbon. It is yarn-dyed ribbon with Eco-friendly dyestuff, and that have the cetification of OEKO-TEX. Size from 3/8" to 1 1/2" width, the tolerance of width within 0.5mm. Bright yarn make the ribbon more shinny. All ribbons are woven by Mulller machine from Switerland.