I am looking to lift an elderly person, who can't support their own weight on their legs, using a comfortable seat, canvas or netting of some kind, with attached straps that I can hook to a carabiner. It can't be as complicated as a climbing harness. I need to be able to slide it under them and hook it up and lift. Wood is not ideal as I would need to leave it under them for some time. Big knots on a net would not be ideal either, the knots would have to be really small an unnoticeable to the 80 year old butt. Thanks for the help.