The thermal underwear set is made of 76% nylon and 24% spandex, lightweight, thin, and semi transparent, superiority on elastic recovery, comfortable fit to your body Stretching freely without tightness, silky and breathable, just like your second layer of skin. block the cold air and quickly keep warm. Whether workout, Yoga, jumping, hiking, running, cycling, or everyday use, the slimming long underwear keep you fashionable and flexible, Basic long johns for women are suitable for all-weather, seasons, and occasions, They can be worn under your shirt to the office,with your casual wear to go to the mall, Casual or fashion, fun or pretty