VentaPak - Lightweight Backpack Ventilation Spacer
If you wear a heavy backpack while biking, walking, hiking, exploring, camping, commuting, or just sitting on a bus or train, then get way more comfortable by getting it off your back with this cool new VentaPak. This lightweight backpack ventilation spacer increases airflow between your back and backpack to drastically reduce heat build up and sweat and also help alleviate back and shoulder strain while improving your posture. It features a lightweight external frame, a mesh arch that helps support the lower back while evenly distributing weight, fits most standard backpacks, and it also doubles as a head hammock / travel pillow or as a cooling lumbar support for chairs. Perfect for students, delivery cyclists, outdoor explorers, fallout survivors wandering the apocalyptic wastelands trying to comfortably carry whatever they can, and much more. I'm surprised backpacks aren't designed with something like this already built-in.