>>2078533merino wool shit.
Literally everything I wear for multidays now is made of merino or blended with it.
Dries WAY quicker, actually doesnt smell bad after sweating in it (so one shirt can last you the whole time. Legit did 4 days/30 miles in one hiking shirt and my sensitive-nosed GF even commented that it smelled fine on the last day). good warmth:weight ratio. warms even when wet. good brands are also comfy(I have a Kuhl, arcteryx, and smartwool Hiking Ts. The Kuhl and Arc shirts have a polyester second layer on the shoulders to reduce wear from your pack)
