Discovery uses a unique seam construction, with 2 thread colors woven into the flatlock to create a rich look. It's a warm, breathable full zipped fleece midlayer that no one else has. Breathable fleece provides great insulation. Soft and cozy midlayer feels great against the skin or over a baselayer. Two-tone thread stitching offers a unique look. Material: Polyester, Elastane.