Profoot Solefresh Full Length Ultra Thin Shoe Liners Profoot Solefresh Full Length Ultra Thin Shoe Liners absorb perspiration & are lightly fragranced to keep your shoes & feet smelling fresh. The dermatologically tested insoles are made using a four layer technology: Upper Layer: this is made from a breathable dermatologically tested fabric. Middle Layers: these two layers are made from a highly absorbent cotton wool containing allergen-free perfumes & anti-bacterial active agents (Pyrithione Zinc 0.01g per insole) to keep your feet & shoes fresh & odour free all day & help prevent fungus. Bottom Layer: this has an anti slip coating to ensure the best fit in the shoe. Profoot Solefresh Full Length Ultra Thin Shoe Liners will fit most shoes & are suitable for use throughout the year. One size fits all.