Men's Organic Cotton Thermal Underwear Long John Pants - Luxury Base Layer 100% Organic Cotton. Essen - Thermal wear long johns are exclusively fulfilled by Amazon. Buy ONLY when indicated as being shipped by Amazon Mens thermal leggings are ankle length with body defining fit, and double thermal layer to keep you warm and dry. Flatlock seams and tagless labels to prevent skin irritation Thermal base layer, ideal for wearing under jeans or trousers, suited for low-impact activities Machine wash in cold water. Imported