Not cheap but if you ride through winter it’s probably a good investment. When I was doing the training for my full licence in 1992 I had a Hein Gericke one-piece suit that, while it made me look like I was about to be launched in to space, was completely waterproof, cosily warm and very confy with a fleece-lines area in the seat. It’s long gone but the memory of it being a brilliant piece of kit remains to the point that I’d consider the GTX if I needed all-weather protection.
It’s a shame they have to call it a ‘onesie’. We don’t call one-piece leathers ‘onesies’ because it has a pejorative overtone.
Being all black with a hood, makes me look like a member of some satanic cult. 
