Aero socks are one of the most cost effective aero upgrades (and they look pro too). Unlike some others, ours do not feel stiff or bulky. These ones are also not a knit upper, but are instead a seamed solid fabric. The Valley Paint design is based on the abstract creative process of a painter, creating works of art by layering dabs, strokes, cuts and imagery forming pieces that are brim-full of ideas, energy, color and movement.