If you're into swimming and swim gear, you're probably way ahead of us on this one. Canadian tech firm Form has launched an update to its Smart Swim 2 goggles, which track your performance and heart ...

Into the water and these fit as you would expect a classic pair of pool goggles to fit. Close to the socket with a good seal (which I can vouch for after a clumsy dive start in a race in these!), low ...