Chic Ugg-style boots, which cost from 50 pounds to 100 pounds, increase the risk of ankle sprains and bad posture, experts have warned.
The soft structure and heel-less sole create a breeding ground for fungi that cause foot infections, according to health researchers.
The boots are often spotted on the sexy legs of Katie Price and Coleen Rooney who like their soft sheepskin interior.
And the cherry on the icing is that, their woollen or sheepskin exteriors go with anything from skinny jeans to dresses, reports The Sun.
However, podiatrist Linda Hawkins, of Lee, South London, said: Sheepskin boots, like other footwear without heel and sole support, are only suitable for short-term wear.
Use all day leads to the boot structure breaking down, increasing the risk of a twisted ankle.
Pharmacist Hasan Ukra, who works in the flagship Boots store in London's Oxford Street, said: Wearing these kind of boots could increase the risk of fungal infections due to the moist environment created.
And I've seen a marked rise in ankle sprains due to the soft and comfortable nature of the boots.