The Minus33 typically has good stuff. But it depends on what you go with for material thickness. Merino Wool is probably the best option you can get for a base-layer. If you are always cold, then go with a heavier thickness (mid-weight or expedition-weight). The expedition is more expensive obviously, but this is where I usually found the best price for the Minus33 Merino Wool. Here is the Medium-weight from the same place. You can also look at their Coldpruf brand. I like them for a little bit of cost savings over Minus33.