In terms of protection against cold,does...
In terms of protection against cold,does it keep your body warmer compared to synthetic compression fit clothing (eg Under Armour Coldgear)? When choosing size,is better to wear skin tight or slightly loose? (not intending to do any vigorous activity while wearing it).
I have found merino to be very comparable to synthetics when dry, but where merino really shines is when it gets wet. Merino can absorb up to 1/3 of its weight in water and it stays warm even when wet.
As far as compression goes, loose fitting clothing is typically better for being sedentary, because heat gets trapped in the folds.