The Archetype Crewneck Sweater in Grey Melange from Helmut Lang NYC. 

Details
Crew neck sweater in chunky wool.
Features a ribbed hem and cuffs.
Fits true to size.
Model is 6'2" and wears size M.
Crew neckline
Rib-knit cuffs and hem
Style Code Q07HM707
Composition: 84% Merino Wool, 16% Polyester