The ProMAX 420 offers a high quality design in a light weight gi. At 420GSM the jacket provides a durability and thickness that will hold up roll after roll. We've added reinforced side slits on the jacket and pants, along with reinforced stress points so you never have to worry about dependability even against your toughest competition. The 100% cotton twill pants have a thick polyester bungee cord for the best fit. Heavy thread contrast stitching was used throughout the ProMAX 420 to give this IBJJF compliant gi the feel of true reliability.