Ryan Williams wrote:
Assuming you want a full waterproof shell and you want to climb in it I'd go for one of the newer, more breathable membranes. eVent, MH Dry Q Elite, etc. Rab has some new shells that are pretty awesome looking and there is no question that they make excellent products. Edited to add: Maybe you can go even lighter than a full membrane and get something like a Pertex Shield jacket. I personally would go for a good windproof and a super light emergency rain shell in my pack if I were planning on spending summer in RMNP.