Backpack Ventilation Frame UL1 (Original) Ultralight Backpack Ventilation Frames Thin mesh side for a

Thin mesh side for a basic layer of cushion

Big Side Pockets: Durastretch

Hyperlite Mountain Gear

the military

5 ounces / 156 grams (with sleeve)

Backpack Ventilation Frame UL1 (Original) Ultralight Backpack Ventilation Frames Thin mesh side for aThe Backpack Ventilation Frame (Ultralight 1) is the easiest and lightest way to give your backpack that ventilated back panel feel. This design uses our patented airflow frame concept to create an airflow gap between you and the pack, helping dissipate heat and prevent clammy, soaked backs. This is our original design without a mesh sleeve to maximize airflow and ventilation on your back. If your backpack makes you sweat too much, this attachable