SITKA CORE LIGHTWEIGHT BOTTOM. With a gusseted no-bunch crotch and low-profile elastic waistband, the CORE Lightweight Bottom provides just enough warmth for when temps dip and dial up animal activity. Features permanent Polygiene technology to neutralize smell. The CORE Lightweight Series is the next-to-skin layering foundation for SITKA Systems, actively moving moisture away from the skin while keeping the hunter dry and comfortable. Product is Performance Fit, designed for minimal layering. Lightweight Core bottom is a part of late season system. This system is built for ultimate protection from unrelenting late season conditions below treeline. The system enables you to stay comfortable, concealed and in the field longer through the worst of weather. Product Care. Routine Care and maintenance ensures the optimum performance of your SITKA Gear. Be sure to follow the manufacturer's care instructions – typically found on the inside tag. Use a front load washing machine and a gentle detergent. Use warm water on permanent press or gentle cycle and rinse twice to ensure all cleaner has been removed. Do Not Bleach + Do Not Dry Clean + Do Not Iron