Mountain High Knitwear has added K-Swiss to its stable of licensees. Already producing socks for brands such as Tommy Hilfiger, Sean John, PONY, Esprit and Bill Blass, the domestic supplier markets other labels such as Mountain Hugh, MH Knitwear, Royal Bermuda, Uomo Domani and Royal. The new K-Swiss collection for spring 2009 will offer three distinct lines: Lifestyle, UltraCel Sport and UltraCel Perform. UltraCel Sport features moisture management, cooling mesh panels, a half cushion for a better fit and arch compression to prevent socks from sliding inside the shoe, while UltraCel Perform incorporates anti-microbial silver technology and articulation stitches.