Features: Thermal underwear is made of soft fleece lining for excellent comfort and warmth in cold weather. Stretchy elastic and lightweight design for style and function. Two-component fiber is silky (smooth) outside and fleece inside - pleasant to the body. Breathable will not make repels odors and unpleasant smells left behind from sweat and dirt. Fabric is wicking moisture and drying much faster than any other material. High density fabrics that provide comfort without losing shape after long time wear. Underwear is elastic - provides perfect fit. All seams are flat-lock for high comfort when wearing - eliminates rubbing and pressing with seams. Top with crew neck and long sleeve has inserts of breathable perforated tissue, providing additional thermo regulation. Hypoallergenic - is less itchy and irritating than regular underwear. Can be worn either as standalone or in combination with other layers of thermal clothing, allowing you to achieve perfect level of comfort and thermal regulation. Specification: Material: 90% polyester+ 10% spandex. Size: XS/S/M/L/XL/XXL/XXXL/XXXXL Color: Black/Grey/Navy Blue Charcoal/White Package included: 2x Thermal Underwear Set