Alpinestars alps 2 kneeshin guardthe alpinestars alps 2 kneeshin guards provide the ultimate in both impact protection and breathability highly flexible and very lightweight theyre equipped with advanced pe foam and aramadic fibre to protect you from impacts and abrasions theyre ideal for all day sessions as their breathable rip stop fabric aids efficient airflow silicone printing on the inner liner and velcro straps ensure they maintain position features material rip stop fabric po