The jacket is made of 450 gsm (gram per square meter) pearl weave. Rubberized collar to prevent sweat and bacteria from absorbing into the fabric, the collar is also reinforced with extra seams. The pants are made of 10oz twill (cotton/polyester blend) and is reinforced at stress points. Belt is bought separately. 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.