Core INS removable multi-zone breathable wader insulation system for added warmth in the legs and seat that are most often submerged. Thiosulfate moisture resistant insulation provides more warmth than other insulations even when damp from sweat vapor. Easy on and off design allow user to slip in and out of wader easily and eliminates binding in knees. Warm fleece upper. Easily zips and snaps in minutes into any Hodgeman wader that accepts core INS system.