The Simms ExStream Insulated Hoody is no doubt an extreme jacket! This jacket features a very durable Toray® outer, and PrimaLoft® Silver Thermoplume w/ Cross Core™ technology - 200g fill rate throughout the jacket for superior warmth, even in the harshest conditions. Those days when you can hardly make a cast because the guides on your rod are constantly freezing are not even a match for this jacket. Here is what Simms has to say about the Exstream Pull Over Insulated Hoody: Cold-day mastery (minus the bulky catastrophe), the ExStream® Hooded Jacket is powered by hardworking PrimaLoft® insulation for knockout warmth that punches above its weight. PrimaLoft® insulation stays warm in wet environments. Stretch fabric maximizes mobility and range of motion for casting. Lightweight, stretchy pre-baffled fabric filled with PrimaLoft® insulation for ease of movement and zero snags. Two zippered handwarmer pockets; zippered chest pocket; internal mesh dump pocket. Oversized collar for warmth and hood with a structured brim. Interior stretch knit cuff for comfort and sealing out the elements. FABRIC TECH: Body - Toray® pre-quilted stretch fabric - 30D 91% polyester, 9% spandex with durable water repellent finish. Insulation: PrimaLoft® Silver Thermoplume w/ Cross Core™ technology - 200g fill rate throughout. Simms Men's Sizing Medium Large X-Large Chest* Neck* Sleeve* 39" - 41" 16" - 16.5" 34" - 35" 42" - 45" 16.5" - 17" 35" - 36" 46" - 48" 17.5" - 18" 36" - 37" *Listed dimensions are body measurements