The first of its kind, the Ventra Gear Mainframe is the only removable breathable frame that can be used on any backpack.
Ending your hike or bike ride with a dry back entails settling for a pack with a vented backpanel that likely lacks other important features. The Ventra Gear Mainframe instead lets you use any backpack you want — or any bag with at least one shoulder strap — by attaching to it using several anchor points.
Mainframe is lightweight at about 11 ounces (in a medium) and works with loads of up to 60 lbs, including both larger camping packs with hip belts and smaller daypacks. And since adding or removing a pack takes about a minute, it’s convenient enough to use with several bags through the hotter months.