With long sleeves and a no-roll mock turtleneck, the Sitka Youth CORE Midweight Mock T delivers just enough warmth for chilly fall days without making your hunting partner sweat. Permanent Polygiene® Odor Control Technology neutralizes odor by stopping the growth of odor-causing bacteria and fungi. The CORE Midweight Series is the next-to-skin foundation for your kid's cold weather system, with a micro-grid fleece backer that lightly insulates while actively moving moisture away from the skin.