Keen are perhaps more renowned for sandals than boots, but the Gypsum proves that they have expertise in substantial technical footwear too. These are mid-cut to provide good levels of support without constricting movement. The uppers are tough enough to deal with rough ground and an ESS shank provides torsional stability, but the overall package feels lightweight and mobile. A slightly wider than average last means they are able to accommodate swelling feet in warm climates.