Performance fleece derived from a technically engineered fiber formation paired with a brushed back creates a garment of superior warmth. Microscopic "pockets" inside the fiber create a thermal warming effect next to you skin. It has inherent moisture management capabilities to keep you dry and warm. The dense knit construction with unique fiber formation give this fabric a lofty hand that makes it ideal for layering. This fabric is designed with spandex to enhance fit, mobility, and moisture management. Top access, functional fly opening Lightweight, HeatFX branded waistband Reduced bulk, flatlock seam construction Tagless labelling Body fit Ideal for activity level moderate to high