GARMIN FENIX 6
£599.99 The Fenix 6’s feature list is huge, which adds up to a relatively bulky watch (possibly too bulky for streamlined triathletes). Still, if you’re happy to nominally affect hydro and aerodynamics – and have the money – this could be for you. A crystal-clear screen relays a host of performance information beyond the traditionals of pacing, speed and the like. As a snapshot, you have the ClimbPro feature, which details your current and upcoming climbs, the latter particularly useful for pacing and nutrition timing; a Pulse O2 sensor, which gauges how well your body’s absorbing oxygen; and Respiration Tracking, which assesses how your breathing rate changes through the day.
Okay, we’re not 100% sure of its tri benefits, but it’s clearly useful for acclimatising at altitude. garmin.com