S3A(R) silver antimicrobial technology For odor prevention Smooth polyester fabric with a light fleece lining Keeps you warm while retaining versatility Elastic waistband For a secure fit Flatlock seams Ensure all day comfort Tapered legs For easy layering The Koretec Base Heavy Weight Bottom is your go-to, hard working first-layer. From preseason scouting to the heart of the rut, our exclusive S3A(R) technology helps keep stink down while you get the job done. What's more, is we've delivered quality and performance without breaking the bank. Exercise caution when using ozone on items with significant elastic or rubber content. Discontinue use on rubber or elastic items if you notice degradation or weakness in the structure of the items. Do not expose safety equipment to active odor destroyers.