I like to wear Underarmour "compression" tops and bottoms as baselayer. I know they're not medical compression (hence the quotes), but I like the feeling. I have two merino shirts now, and I like them for merino's touted properties, but they aren't tight enough for my taste. Both are slim fit, but the material itself is just too stretchy.
Are there brands out there that fit more like Underarmour? Wool/poly/spandex blend maybe? Or maybe buying a size too small would work? I imagine that would cause quicker wear, though.