The tougher puffer, the Thermotough Jacket has been specifically designed to provide durable, maximum core warmth and comfort without the bulk of traditional insulated jackets. Constructed with a tough Nylon RipStop outer fabric provides you with a durable high insulation layer ready when the temperature really drops. Packed with ultra-warm Primaloft® Silver down blend provides you 100% protection from the wind with water resistance. Using welded baffles, this jacket is purposely built to provide ultimate protection from the elements and promote high insulation warmth to your core during plummeting temperatures.