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Designers such as Loewe showed their racier side at fashion week - think stretchy materials and big brand logos that wouldn't look out of place on your favourite athlete.

The patch is a soft and stretchy device, about the size of a postage stamp, that adheres to the skin.

People who have had hysterectomies, and people with conditions like obesity or Ehlers-Danlos syndrome, which affects collagen and makes tissues stretchier, are at a higher risk.

Gels -- such as contact lenses -- contain liquid and are soft and stretchy.

"A lot of yarn isn't very stretchy, yet once knit into a fabric, the fabric exhibits emergent elastic behavior," Singal said.