In the past, insulated button-up shirts always seemed like a good idea but failed to deliver all day comfort and performance...until we built the Fusion Snap Shirt. We transformed the insulated shirt from an awkward, overstuffed button-up into a high-performance cool weather garment you can wear to dinner. Sporting 40 grams of Toray® 3DEFX ™ throughout, the Snap Shirt gives you just enough heat retention for cool days. Highly articulated sleeves and gusseted armpits mean you have full range of motion in your shoulders and back. Whether you’re tucking a cast under an overhanging tree or pulling hard on the oars to let your buddy send one in there, you won’t even notice that you’re wearing the Fusion Snap Shirt.