The mesh back not only helps with air circulation, but it also provides extra lumbar support for people not wanting to be hunched over when they immerse themselves in work. (geekwrapped.com)
With straight straps the front carry can be worn in crossed position, making an X over the wearer's back, and giving extra lumbar support to the wearer. (tandemtrouble.com)
The power - adjustable front seats look inviting, which should equate to being comfortable and here your eyes don't deceive you, they're exactly that with extra lumbar support. (carbuzz.com)