By Terry's Terrybly Densiliss® Primer is a silky serum base that prolongs the wear of makeup, all while strengthening the skin. Packed with powerful anti-aging ingredients, this primer targets wrinkles and helps increase collagen production. 1.01 fl oz/30ml. BY TERRY Women's Terrybly Densiliss® Primer A great designer gift. Shop BY TERRY at Barneys New York.