I've been really pleased with Core4's merino baselayer/underware.
bought a set of camo pants-zip t pullover shirt from camofire, Just to try while hunting the past couple weekends for Arizona coues deer. The Core4 works good, fit is good.
but overall, it is a copy of my Sitka clothes. Quality is not as good as the Sitka either. Ironic since I believe both are made in China or somewhere in Asia.
So the pattern I puchased in Core4 is max one and will be back up to my sitka outfits in optifade forest and open country.