o2totes ultra lightweight backpack for inogen one g3 unit (patented design) (black) o2totes wear your oxygen with style since 2007, o2totes has been designing & manufacturing portable oxygen bags & backpacks for oxygen companies across the world. a small, family-owned company owned and operated in the heart of the u.s. designing oxygen bags is what we do. we utilize safe materials, innovative designs & create products for individuals who want & need a better option. we never use our logo on our backpacks or carry bags, we want your bag or backpack to be less medical and more you.