Aaaaa I'm so confused. So many reviews. So little faith they mean anything.
I'm looking for a warm midlayer hooded synthetic jacket for summer alpinism where I won't be carrying anything wamer (like a big duvet jacket which I would have in winter or if planning to bivi). So it'll be mostly used on belays and should be warm enough that if unexpectedly caught out overnight, with a waterproof on top I won't die, but won't expect to be hugely comfortable either.
Looking for something that weighs 500 grams -ish I guess.
Names I have encountered include Arcteryx atom, Rab xenair alpine, Rab generator, Patagonia DAS parka, but I wouldn't rule out others
Is there a clear choice that everyone is using already and just works?