Suunto is a name commonly associated with rugged sports watches, but the Finnish brand has recently turned its attention to the world of running headphones. The Suunto Sonic is the brand’s second pair, designed to fend off sweat and rain, offer customisable sound to fit your running adventures, and enough battery life to get you through a few marathons.
The Sonics have all the ingredients to be fine headphone running companions, but do they deliver where it matters? I put them to the test during the toughest period of my London Marathon training
