1. As a lightweight thickness thermal, this can easily be worn as a base layer that will wick away moisture while keeping you cosy. You can comfortably wear these all day from sunup, to past sundown for whatever comes you way. 2.The durable 4-way stretch rib knit hem and snug fit will flex, conform, and move with your body to maintain range of motion and comfort. Whether you're camping, hiking, snowboarding, working out, working, or just taking it easy, this comfy thermal has got you covered. 3.Whatever the season, this light thermal will be a solid choice in your wardrobe as the Merino wool has naturally hygienic properties to keep you fresh through the day regardless of the weather. 4.The excellent warmth to weight ratio of this thermal make for an ideal choice while traveling and packing when you want some lightweight long johns during your adventures.