I spar with kickboxers ranging from just over five feet in height & 120lbs in weight, up to a six foot five, 290lb HEAVYweight. We use this headgear anytime there's a 30% + body weight discrepancy between the two strikers. It keeps black eyes from becoming cut eyes and it keeps bloody noses from becoming broken ones. Very adjustable and comfortable to wear. The only weak link that we've found is the padding around the underside of where the tip of the chin rests, so "Keep your chin tucked", ha!