SheepsWool ImpacTeq liners are designed to absorb extreme impact with the added benefits of SheepsWool. They're hypoallergenic, naturally water-resistant and fight odor. Open-cell, non-Newtonian foam transforms from soft to rigid upon impact, while a layer of SheepsWool increases air flow and moves heat away from the legs. The liners mold to the legs for a secure and custom fit. Machine wash and air dry.