The Smartwool NTS Midweight 250 Funnel Zip Top is popular, so you know you'll be popular by association when you wear it. This baselayer has it figured out: moisture wicking technology, chafe-free seam construction, and panels so that when you're backpacking through the tundra and meet a bear, you won't be worried about those uncomfortable pack straps digging in and can focus on wrangling that bear instead.