M&S unveil £28 'ultra-flatting' contouring gym leggings that

M&S unveil £28 'ultra-flatting' contouring gym leggings that promise to lift your bum, slim your thighs and flatten your tummy

Scrunched Lifting Contour High Waist Leggings - Grey

Sync Seamless High-Waisted 7/8 Legging - Fabletics

Ultra Game womens Leggings Pants, Black, Small : Sports & Outdoors

Marks & Spencer's contour leggings - Are M&S' new ultra-flattering contour leggings a gym must-have?

Two Tone TLC Leggings in Uniform Green and Acid Lime

M&S unveil £28 'ultra-flatting' contouring gym leggings that promise to lift your bum, slim your thighs and flatten your tummy

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These M&S gym leggings pretty much sell out every month (and we can see why)