When chill creeps in, the Simms Midstream Insulated Hooded Jacket for Men steps up with strategic warmth and streamlined comfort. Built around Lavalan Sport wool insulation (60-gram in the core; 40-gram in the sleeves, hood, and side panels) this men's mid-layer maximizes thermal retention while trimming bulk in high-movement zones. Naturally breathable and odor-resistant, Lavalan wool stays warm even when damp, extending long sessions on the water without sacrificing comfort. Abrasion-resistant nylon body and lining fabric, treated with a durable water-repellent (DWR) finish, guards against wet conditions and daily wear. The adjustable hood maintains peripheral vision and stays put when the wind picks up. Sleek, conceal-zippered chest and hand pockets hold essentials close, while dual internal mesh dump pockets offer fast stash options for gloves, leaders, or snacks. Pack the entire jacket into one of the interior pockets for simple storage when conditions shift. Lycra-finished cuffs and an adjustable hem complete the fit, making the Midstream men's insulated hooded jacket from Simms easy to layer under shells or over base layers. Main/Liner: 85% nylon/15% spandex woven. Insulation: main body composed of 80% virgin wool/20% corn-based PLA; sleeves composed of 70% virgin wool/30% corn-based PLA. Machine wash. Imported.Manufacturer style #: 14042. 85% nylon/15% spandex woven main/liner fabric Insulation: main body composed of 8-% virgin wool/20% corn-based PLA Sleeves composed of 70% virgin wool/30% corn-based PLA Lavalan Sport wool insulation Strategic warmth with reduced bulk in high-movement zones Naturally breathable and odor-resistant Abrasion-resistant nylon shell and lining with DWR finish Conceal-zip chest and hand pockets for secure storage Dual internal mesh dump pockets for quick-access items Packs into its own pocket for easy storage