It is made from a light-weight 400gsm Pearl Weave preshrunk fabric. We still recommend that you wash the gi in cold water and hang dry it.? Lightweight pants are made from 400 gsm CVC 60% Cotton 40% Polyester fabric have a rope drawstring for tightening. Contrasting and reinforced stitching in seams and other key areas for durability and added strength. Special Pre-Shrunk Fabric which allows you to machine wash and machine dry your gi.