4 Pairs multi-use invisible footies 6-11. These socks can be used as trainer liners making them perfect for; sports, the gym and running while they are also a perfect comfy invisible everyday sock. They are breathable and have built in freshness to prevent odours. You have choice from a plain design or a funky stripe design and coloured heal and toe. With a mix of colours, it will be easy to find a pair to for you.