MIDWEIGHT BASE LAYER - The adventure is yours, we'll keep you warm and comfortable; The Hot Chillys Clima-Tek Tights for women are designed for performance and wearable comfort in any season; These women's thermal leggings with a high-rise waistband for flattering fit will become a perfect addition to your cold weather gear; Made of a buttery soft, cottony hand Clima-Tek fabric with all of the performance of a polyester/spandex, the active base layer is ready for outdoor activities RELAXED FIT - The thermal underwear bottoms for women are designed with a looser fit that lies gently on the skin without binding; Despite the relaxed fit, the fabric consists of 86% Polyester and 14% Spandex, so the silhouette accommodates movement; These women's warm tights are perfect for summer camping in the mountains and winter wear anywhere WARMTH FACTOR - Ranked from mild to hot, the Warmth Factor Thermometer tells you how warm is your thermal clothing; Warmth Factors 6, 7, and 8 are considered Midweight and are very popular for most cold-weather activities; The Hot Chillys Women's Thermal Pants have a warmth factor 7 out of 10, as they feature a lightly brushed stretch fabric, that provides warmth in cold conditions; At the same time, the Clima-Tek Tights for women with UPF 30+ also protect you from harmful UV rays 4-WAY STRETCH - The durable and breathable fabric with the elastic feature will hug your body, so your thermal leggings will move with you, eliminating extra bulk and providing a full range of motion, as well as improving performance; Nearly all of Hot Chillys body-fit products include a 4-way stretch for unlimited movement ACTIVATED CARBON - The Hot Chillys activated carbon enhances thermal regulation, while exclusive moisture transfer fibers (MTF) move moisture away from your body by employing hydrophobic yarns to wick away perspiration; You will look good and feel better in these Hot Chillys Clima-Tek Tights, designed to keep you cool, dry, and comfortable, no matter what the day brings