S3A(R) silver antimicrobial technology For odor prevention Fleece fabric Keeps you warm when the temperature drops Set-in sleeves For flexibility in the field Flatlock seams Ensure all day comfort The Koretec Base Polar Weight Top is your go-to, hard working first-layer. From the heart of the rut to those freezing late season hunts, 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