Sondico aerolite xrd shin guards the sondico aerolite xrd is a revolutionary shin guard with poron xrd impact protection foam technology to improve protection levels and offer an alternative to standard foams the shin guard has a low profile shell for an ergonomic fit and is infused with carbon for stiffness and strength the shin guard comes as standard with two polyester spandex compression sleeves to lock the xrds in place shin guards poron xrd technology the shell is lined with