OluKai, a California-based lifestyle footwear company, has made an unspecified investment in Kaenon, the Californian brand of sunglasses. Darren Rosenberg will continue to run Kaenon as an independent entity. Known for its proprietary SR-91 polarized lenses, Kaenon was founded in 2001 by Darren and his brother Steve, who has left the firm.

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