Some great opinions on this topic. I recently purchased a couple merino 145 shirts for base layers and am quite pleased with the quality and performance so far. I'm looking at a vest for insulation but I want a solid pattern. I don't think kuiu or sitka makes it though. As far as this pattern debate goes, doesn't sitka have a science behind their design pattern? Or at least they boast about it. Kuiu on the other hand is about lightweight performance gear. Sitka is similar too in lightweight gear though. I don't think you could go wrong with verde or optifade pattern. I'm new to both this year. I shot an elk at 20 yards but wore kings mountain shadow camo. Stalked a few mulies to about 20 yards in open sage country wearing sitka but with kuiu base layers. Dont know which pattern worked the best, but something worked right.