The Sugoi MidZero Running Tight offers essential midweight thermal coverage. The crotch gusset reduces inseam bulk while the signature grip ankle elastic adds to the technical excellence of the tights. Made of fleeced thermal MidZero fabric, the Sugoi MidZero Tights are suitable for a wide range of temperatures.S2 Insulation: Offers versatile mid weight thermal protection for either single layer use in a wide variety of transitional conditions or layering in colder and more severe weather. The fabrics used in S2 garments are most often lightly fleeced on the inside to trap air and create light insulating layer. Full mobility and stretch along with convertible ventilation and high performance are paramount for comfort during aerobic activities Breathable: Reduces overheating by allowing perspiration to escape, Dries quickly, Durable and lightweight Warm Wick: Wicks perspiration from skin to outer surface, Spreads moisture from fiber to fiber with capillary action, Dries quickly through evaporation, Creates a cool, dry comfort for high exertion activities Moisture Transfer: Wicks perspiration from skin to outer surface, Spreads moisture from fiber to fiber with capillary action, Dries quickly through evaporation, Creates a cool, dry comfort for high exertion activities Sugoi flat seam construction. Inside key pocket at waist. Stretch drawstring with elastic waist. Signature leg grip Wicking, breathable MidZero? 88% polyester/12% spandex fabric. MidZero Fabric: Offers full-motion stretch without bulk. It's a perfect midweight layer suitable for a wide range of temperatures. The soft, brushed, inner side expedites moisture wicking and increase air flow, trapping body warmth next to skin.