The best jacket I've used is Zpacks' rain jacket.? $300.? 5.4 oz. Everything else I've used is heavy and I end up wet.??
I save mine for exclusive use backpacking and it's going strong after several years.
The rain pants are excellent too.? And they can act as an additional leg layer.? $150? 3 oz.
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Byron Nevins
Lead Moderator of JMT at groups.io