You knew something had to give. One doesn’t spend more than 15 years designing a lineup of the most breathable waders and outerwear, only to have that breathability compromised by substandard layering. K.C. Walsh and his Simms team have poured their efforts into the design and manufacturing of powerful wicking, quick-drying layering products. The first and foremost factor in a good layering garment is it’s wicking, or breathability; not just the movement of moisture off your body, but the transport of moisture from one layer to the next outer layer. Without this wicking quality, moisture is going to stay against you skin, or within your clothing, keeping you wet and cold. (More information on Simms Layering)