The Simms Super-Fly Patch resists deformation and provides constant pressure on the shank of a barbless hook, providing you with a more secure hold. The Super-Fly Patch can be attached to any Simms vest with velcro brand fasteners. FeaturesDurable EVA foam resists deformationAttach to any Simms vest with velcro brand fasteners backProvides constant pressure on the shank of a barbless hook for more secure hold