Rooster Polypro™ is constructed from a combination of Polypropylene (94%) and Elastane (6%). The brushed inner fabric gives it a thick, fleece-like, high quality texture which feels incredibly warm and soft next to your skin. Polypropylene is naturally hydrophobic, which means the fabric feels remarkably dry, even when wet. Wear it next to your skin underneath your neoprene suit, ski suit, drysuit, salopettes or whatever mid-layer your sport requires. Wear it on the water or for winter running, cycling, kayaking, walking – anytime you need a thermal base layer.