BOSS Parkour L Runn Trainers in Blue. If athleisure is your style, then these Parkour BOSS trainers are a must-have in your rotation. In this navy colourway, these shoes encompass an understated sleekness, featuring black leather fixtures lined with silver trims and brand embossing. In compliance with the sporty edge of the brand, the Parkours adorn a rubberised lace-up cage for additional stability, while blue stitch detail and a contrasting foam midsole add an element of playfulness to the piece.