Patagonia X cold weather. The Synchilla® Snap-T Fleece Sweater is a warm and durable fleece pullover. The Snap-T® chest pocket brings a cool look.Soft, plush and durable, it wicks moisture, dries fast and fends off cold-weather chills. Hem and cuffs are trimmed with spandex. The sweater is Fair Trade Certified™ sewn.