Hi folks, hoping you can offer some recommendations for a baselayer shirt. Looking for one that hopefully will do it all for a High Sierras trip in July. I'll want to wear this 24/7 for 9 days as my shirt during the day and baselayer/sleep at night. I'll be in Yosemite including relatively low and extremely hot (Pate Valley/Grand Canyon of Tuolumne, 4k elevation and triple-digit temps) up to peaks at 11k+ and camp probably above 10k at least a couple of nights, so chilly evenings and potentially some cool daytimes.
Not sure if one shirt can even do it all given the range of conditions. I'll want it to keep me cool and dry during the day and also provide enough warmth when chilly to act as a baselayer. (For warmth top layers will be only this shirt, UL down sweater, and DriDucks rain jacket. If needed I could add a short-sleeve T or windshirt but hoping not to.)
What I'd like:
• long sleeve
• low stink
• prefer athletic fit
• not too fragile but durability not a big issue, not much brush or rock abrasion
• neutral on sun protection, good to have but extra SPF not necessary
• neutral on zipper
• neutral on hoodie
• Not sure if a 120-150 merino will work or will it wear too hot
I appreciate any recommendations you have, thanks!


