two-ply 
adjective
(Of a material or yarn) consisting of two layers or strands.The ties are two-ply cotton yarns in colors of either blue (probably indigo) or brown....
- The entire wing was fabric covered and the leading edge had two-ply cloth reinforcing.
- The collection of shirts in shades of orange now includes plains and checks, including diagonal checks and come in two-ply cotton and blends.
noun [mass noun]
1Yarn consisting of two strands.It is a small piece of two-ply cordage approximately 10 cm long.
2Plywood made by gluing together two layers with the grain in different directions.This two-ply composite is then machined into the six tapered triangular sections that when glued up together, form the familiar split-cane form.