Charcoal has been added to the fluffy and soft 100% merino wool leggings, which are a great layering item for bottoms when it's cold! Gray heather is a calm and beautiful color, but we have received requests for a deeper charcoal color, so we are offering two colors this season. Just putting one piece under your bottoms gives you a sense of security and is recommended for the upcoming season. It's stretchy, so you can easily layer it over Silk 100 leggings. It can also be worn by slender men. Please see the product page for details.