Verified Buyer Reviewed by ROutdoors from Montana on Thursday, February 5, 2015
After years of Smart Wool, I broke down and tried a new brand. So far, I am pleased with Icebreaker. These bottoms are mid weight however, they are a lighter mid weight than Icebreakers 260 version. If you want something heavier duty and warmer go with the 260's which are heavier than Smart Wool's mid weight base layer. If it's chilly out, these will do the trick. Tops run true to size and bottoms seem just a bit on the snug side for the Small's and mediums. As far as how they hold up, I'll let you know in ten years since it took my mid-weight Smart Wool that long to break down.