185gsm 100% Polyester Outer/Cotton Back Extra Cool And Comfortable Contrast Binding , Two Tone Front & Back The DNC Hi-Vis Singlet design offers protection and comfort in one product. Made from Hi-Vis polyester/cotton back , it helps keep you cool and comfortable during the working day. Featuring two tone colour front & basck for visibility, this Singlet is practical and designed to keep you safe on the job.