As Spring weather starts to warm up, the Ventapak Backpack Spacer will get that hot sticky pack off your back & replace it with some nicely ventilated air-space. That way, you can arrive without embarrassing sweat spots or a slimy shirt. It’s a lightweight external frame that works with virtually any pack and attaches easily & quickly to promote maximum airflow & keep you cool. Detach it & it doubles as a travel pillow or backrest.