iDye Poly Fabric Dye for Polyeser and Nylon - Full Colour Range Nylon Jacquard
Or, for more interesting, two tone, heather effects, try pairing two different colours. Jacquard iDye Fabric Dye Poly & Nylon 14g. For polyester and nylon fabrics. iDye Poly is for synthetic fibres such as polyester and nylon.