The Kari Traa Tirill Tights are functional women&';s training leggings. They&';re this year&';s warmest and have water-repellent material on the front thigh to deal with winter weather. Silicone grip on the ankle holds the pant leg in place, while a crotch gusset and 4-way stretch properties won&';t restrict how you move. The warm, quick-drying material is brushed inside with flatlock seams for non-chafing smoothness. So slip them on. -Rudolf Bionic FinishA(R) ECO - sustainable, durable, fluorine-free water-repellent treatment - on strategic areas -4-way stretch -Flatlock seams for comfort -Quick-drying fabric