Tretorn may not pack the brand punch that Nike does in the States, but to tennis aficionados in Europe, this Swedish athletic company is practically a national treasure. Founded in 1891, the company established itself worldwide with their signature sneakers and tennis balls. As a part of an ongoing collaboration, Swedish designers Acne Jeans have released a new spin on one of Tretorn's most timeless designs. The result of their much-anticipated teamwork is an update on fellow Swede Bjorn Borg's classic '70s tennis shoes, now deemed the Acne Jeans Stroll Mid Canvas and Acne Jeans Stroll Low Canvas. Oxford shirt material lines the interior of the shoe, one of the many finer swipes of detail along with distinctive eyelets that make these shocking-blue unisex kicks stand out in a crowd.