The jacket is made of 350 gsm (gram per square meter) pearl weave. Rubberized collar to prevent sweat and bacteria absorbing into the fabric. The pants are made of 8 oz cotton. Reinforced stitching on all stress points as well as reinforced knee areas. Belt is sold separately. Elastic waist with drawstring. Jacket: 350 gsm pearl weave. Pants: 8 oz cotton. Country of origin: Pakistan. Please read size guide and washing instructions below. If you have any questions, please contact customer service . Also read the Rebelz Ultimate BJJ Gi Guide for advice and tips.