For those cold winter days when one layer is just not enough! These leggings are superior to your traditional thermals and are a terrific base layer under tights and breeches. 4-way stretch with no-chafe seams and elastic at the ankle ensures a proper fit. Supplex material is breathable, wicks moisture, and dries 28% faster than cotton. Makes a snuggly warm pajama set when paired with the Kids Supplex Thermal Turtlenecks. 90% Supplex Nylon and 10% Lycra. Made in the USA.