These black Run Tight leggings from Adidas by Stella McCartney are crafted from Climalite stretch-fabric – a moisture-wicking material that keeps you dry – alongside recycled technical jersey as part of the designer’s sustainable collaboration with Parley Ocean Plastic. They're shaped for a slim fit with a high-rise waist that features a logo-jacquard waistband and a back zip-fastening pocket, then finished with mesh back panel for added ventilation. Pair them with a crop top and trainers for a studio workout.