Wilson Promotion Isoblox Leg Guards Wilson's Promotion isoBLOX® Leg Guards come straight at you with improved fit and protection. The designated right and left designs are equipped with ergonomic toe caps for complete coverage. HD Foam thigh caps protect without the bulk of traditional plastic. These lighter guards use two-piece hinged connections for a flexible fit that stays in place. Not to be overlooked is the isoBLOX technology. This impact protection is light, flexible, and breathable. It wraps around the side of the leg and protects the critical area of the shin. Finally, pressure points are reduced thanks to a four-point adjustment system.