Core Through Black Special Weave 4-Way Stretch Vertical Slub Denim Fabric | TLK11660-1GG Vertical Slub Denim TLK11660-1GG is premium 4-way stretch slub denim woven with warp vertical slub yarn (7S warp slub). It comes in exclusive core through black colourway, featuring distinctive uneven warp vertical slub texture across fabric surface. Composition: 65.4% Cotton, 24.6% Polyester, 7.8% Rayon, 2.2% Spandex (LYCRA). Certified by BCI Better Cotton and OEKO-TEX Standard 100,