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

Marks & Spencer has launched new contour gym leggings that the brand claims are "bum-lifting", "thigh slimming" and "tummy flattening".

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Marks & Spencer's contour leggings - Are M&S' new ultra-flattering

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cosmeticsjunkiee – Amy Savage

Femail puts new M&S contour gym leggings to the test