Endorsed by the UK College of Podiatrists, Insolia Flex® makes walking in flats more comfortable by insuring your foot is correctly placed within your shoes - improving the natural rotational movement of the ball of the foot. Whether worn with jeans or a skirt, over the knee boots are a great way to tackle the temperamental British weather in style. Exclusive to M&S our clever new zips stretch to fit a range of calf shapes and sizes.

• Product Style: Knee boots
• Fit: Regular fit
• Fastening: Side zip
• Comes in sizes 3-8, including half sizes
• Upper: Other materials & textile
• Lining and Sock: Other materials & textile
• Outsole: Other materials
• Heel Height for Ladies Size 4 Shoe: 22mm