The STX Proton U is the next generation Proton +. This lacrosse head is compliant under NCAA and NFHS rules. The STX Proton U follows the same classic design as the Proton + and has been made with exceptional toughness and strength. This lacrosse head has Power V stringing capabilities and additional stringing holes which allow for easier stringing. The STX Proton U lacrosse head is offered in a variety of the most popular colors.