For our first Bottomland merino since the early days, we made a versatile 150 GSM weight perfect for managing body heat next-to-skin as a layer all winter under your thickest layers or your favorite, toughest pair of pants. And if you ever find yourself in a Water Buck scenario, your Bottomland leggings will be more at home in the woods than Cuz's white long johns. (If you're confused about this reference, catch yourself up on one of the most classic deer hunts in outdoor tv history Toxey and Cuz's "Water Buck".