The Saucony website claims that the ProGrid Kinvara 2 are designed to give you exactly, and only, what you need; something which is evident when you first pick them up weighing in at only 7.7oz. The upper part of the shoe is made from a mono-filament mesh which, although appearing very flimsy, remained undamaged when put through the test on numerous muddy runs on the moors of Scotland and on the tarmac of London. Despite first impressions, the material is relentless enough to prevent stray stones, pebbles and mud from getting into the shoe. The sole is made from an ultra-light durable foam and its shape creates a lower heel to toe ratio which sways toward the barefoot genre of running.