These moisturising gel socks contain Jojoba Oil, Olive Oil, Vitamin E & Lavender Oil which work together to help moisturise & soften your feet & reduce cracked heels. They are washable & re-usable & the gel inside the sock is hypo-allergenic. Please note: products such as Socks, Tights, Gel Cushions & Arch Supports can only be returned under the goodwill 14day money back guarantee if they are unopened/unsealed. This does not affect your statutory rights.