Following in the footsteps of fashionistas like Kate Moss and Jennifer Aniston and wearing sheepskin boots all day could be harming your feet.
As winter kicks in, podiatrists are warning about flat feet which can cause pain while walking and even standing.
Prolonged wearing of the boots, originally designed as indoorwear, can cause damage to the foot arch because of lack of support from the boots, they warn.
Bruce Baxter, of Foot Clinic Podiatry Med, said: "They're evil. It's not just the lack of stability, also in older people there is the risk of catching and tripping."
He said boot-style slippers compromise foot posture. In winter people reach for the boots because the sheepskin made them seem warm.