Play your best with the latest New Balance Men's 4040 Bold and Gold Compression Top. Compression where you need it, looser fit where you don’t. Freedom of motion. New Balance worked with professional baseball players to find out what they want and need the most under their uniforms. The result: the new men’s baseball Bold & Gold 4040 baselayer top with NB Flex adaptive fit technology targets compression where you need it but fit looser where you don’t, for added comfort and support.