__The Superfeet BLACK is their most versatile insole, with a specialised low-profile shape that can help to improve the fit, comfort and performance of a wide range of footwear.__ Designed to accommodate lower volume footwear such as every day trainers and approach shoes they can be easily swapped in between most footwear. __ Their thin, low-volume design can help improve the fit and feel of tight-fitting footwear, while the biomechanical shape gives you low-profile support and comfort.__Superfeet BLACK insoles are vegan and free of latex, nickel sulphate, formaldehyde and preservatives.___