important since 80 per cent of runners strike the ground on the outside of the heel, with the foot twisted slightly outward. If the heel counter doesn't do its job, this angled footstrike can cause the foot to move and compromise the shoe's support

. Comfortable, snug and does seem to help keep feet dry on hot runs.Contact 00800 4543 3467Falke RU4 – £9Falke was one of the first companies to offer socks designed to be worn specifically on the left and right foot. It looked like a gimmick at first

. Breathability Mesh panels allow air to circulate in order to keep the feet cool. Ergonomics Many socks come designed specifically for the left and right foot so that the fit is extra snug, and can also have special cushioning features on different parts

for runners with medium arches.We say The Ped is built on Brook’s Universal Platform, which seamlessly connects the foot in motion to the shoe in motion, staying in place to help prevent blisters. From tester feedback it’s hard to disagree, with the sock

for super-efficient runners – and the mark XIII version is no different. The fit is snug around the heel and slightly broader around the toes, and the breathable mesh upper adds to the general feel of light, airy comfort. The midsole is well cushioned

(JBSurrey)In Short: A must have for the serious runner!Strengths:Comfortable and simple design, very accurate data, instantaneous downloading and the ablilty to not only display your runs on a map or Google Earth but to analyse your performance in depth