Practically essential to any and every Sitka System, the Core base layer series is purely for moisture wicking and comfort utilizing 4-way stretch fabric. Designed to literally pull moisture off the surface of your skin, the Core garments are critical for keeping you dry from the inside out. The Core Series is made of 100% polyester bi-component technology that actively moves moisture away from the skin. To ensure a scent free hunt, the Core fabric utilizes silver encapsulated technology that kills odor-causing bacteria. The Core layers are designed as a next-to-skin layer, and the Core tops come in two choices: Core Zip and Core Crew. Both sport a welded bicep pocket, and can be worn in solid colors as well.