POC VPD (Visco-Elastic Polymer Dough) makes wearing body armor feel like not wearing body armor, until you crash. Hip VPD 2. 0 shorts are actually liner shorts that you can wear under baggies, boardshorts, walkshorts, or even jeans to provide hardshell protection without the bulk or uncomfortable feel of hardshell armor. VPD is soft, low profile, and flexible until something hits it. Then it becomes a hard layer of protection instantly. That means the POC Hip VPD shorts are soft and flexible until impact, so they're completely comfortable all day. The stretchy, ventilated mesh that forms the main body of the shorts provides cooling airflow throughout, to keep you from burning up all day while you ride. VPD panels in the hip and tailbone regions protect the most common impact zones. POC even built a chamois into the Hip VPD shorts to ensure all-day pedaling comfort.