The Altra Mens DUO Running Shoes offer max cushion with minimal weight for even better performance and durability.The upper is reinforced with updated mesh, the tongue is padded and gusseted for better lockdown, and the Max-LTô midsole is ready to race mile after mile. Also featuring Zero Drop™ Platform that places your heel and forefoot the same distance from the ground to encourage proper, low-impact form throughout your run.