Stop stingers at practice or on game day with the Douglas(R) CP Butterfly Restrictor. Designed to protect the neck from injury, this butterfly restrictor was developed by Division I-A equipment managers. This sturdy piece of equipment is highly durable and able to withstand impact on the field. Play to win with confidence in the Douglas(R) CP Butterfly Restrictor. Features : Developed in conjunction with Division-IA equipment managers Supports neck One size fits all adult shoulder pads