CURMIOPortable Oxygen Concentrator Backpack, POC Carrying Bag Compatible with Inogen, OxyGo and Caire Units, Bag Only, Gray (Patented Design)

Q: Can this be attached to the back of my Power wheel chair?

Depending on the seat width, it should. I am able to hang it from the back of my husbands wheelchair. It also has the chest strap that might help secure it.

Q: Will it work with bypap

Dear customer, sorry that we are not sure what size is your "bypap". For CURMIO Portable Oxygen Concentrator Backpack, the dimensions of Front Compartment is 9.5 x 4.5 x 10.7 inches. Hope that helps.