Forbes contributors publish independent expert analyses and insights. Mark Faithfull is London-based and covers retail and real estate U.K. fitness apparel brand Gymshark has stepped up its U.S.

The Instagram-famous fitness company aligns forces with the cult performance brand in a first-ever collaboration that sees the debut of five unisex runners drop with ‘Gymshark X R.A.D’ in the U.S.

Gymshark is holding a Black Friday and Cyber Monday sale with up to 50% off sitewide. The sale began on Sunday, November 16 at 11 a.m. EST and includes activewear and accessories. Shoppers can get ...