How do shirt fabrics handle sun/shade and moisture on climbs?

TrekTactician

How do different shirt fabrics handle a mix of sun exposure and sudden shade on trails that climb in elevation?

I took a route last month that started open and moved into tree cover with a breeze picking up, and the shirt I had on under a light shell ended up holding moisture along the back and underarms in a way that made the whole setup feel heavier once the wind hit.

naturenap

That shift from sun to shade with the wind kicking up does pull the damp fabric tighter against the skin along the back, making every step feel a bit more weighted. Some of the lighter synthetics I’ve used let the moisture move through without clinging the same way once the temp drops.

TrailheadTina

naturenap’s point about those lighter synthetics tracks with how the wind pulls the damp spots tight once you’re in shade. The real variable seems to be how the fabric’s weave lets air pass through under a shell without adding that weighted feel. Checking the thickness or knit type before a climb like that might cut the issue down.