STX designed the STX Cell 5 men's shoulder pad liner to simply be the best of the best for advanced youth, high school and collegiate players. This men's liner gives maximum mobility and protection. STX added GeoFlex II, which adds more flexibility in the pads without sacraficing protection. They also upgraded the pad to meet the new NOCSE standard in chest protection that will be mandatory in the 2022 season for all field players. These pads are simply light, soft, durable and really good quality. If you are looking for a go to men's liner that is ready for field play today and into the future this is the one! Watch the product video for sizing information.