This 5 pack of invisibles features a playful bee design, featuring stripes and spots for the perfect everyday invisible sock pack. Available in ankle and trainer socks. This product has been given an anti-microbial treatment to prevent the development of odour which will keep your socks feeling fresh. BIOME Is a specially designed technology which helps to keep your socks fresh and odour free bi-ome trademark of devan chemicals NV. This product contains the biocide linseed oil.