Design PhilosophyWear it as a mid-layer, outer-layer, overlayer, underlayer or however else you can imagine. The MT500 Thermal L/S has always been a key piece in the mtb riders winter wardrobe and this new version adds a neat fitting hood to its predecessors rich featue list.FabricWindproof panels are strtegically placed in the in the most exposed areas to keep your muscles warm and ready to perform in a wide raneg of conditions. The windproof fabric used is also super durable and will brush off encounters with trailside obstacles time and time again.90 Day Satisfaction GuaranteeSo confident are we in this product that, if you are not entirely satisfied with it then we offer a no-quibble refund or replacement policy within 90 days of purchase.