Swimmers battling for gold at this month's Paris Olympics are banking on the latest cutting-edge swimsuits to be their secret weapon in the pool.

Competitors believe innovation can be the difference in a sport where medals are sometimes decided by a mere fingertip, although the evidence is not as clear.

Driven by technology that takes inspiration from space travel, Speedo has produced a new version of its Fastskin LZR Racer suit billed as its most water-repellent ever.