I have one of the Helinox chairs. They've had the yellow ones on offer in millets for ages. Normal price is around £90.
The helinox ones are better quality than the cheap Chinese ones but pays your money, take a chance.
They are quite comfy, but no arms or can holder and take some practice to get out of them without flexing the poles too much.
Get 4 rubber end caps for walking sticks to make a slightly larger footprint for the poles or they dig straight in.