Polo Ralph Lauren - 4D-Flex Lux Cotton Blend Short Sleeve Undershirt Crews 3-Pack. Color 3 Polo Black. On sale for $37.12. MSRP $49.50.. 5.0 out of 5 starsBrand NamePolo Ralph LaurenProduct Name4D-Flex Lux Cotton Blend Short Sleeve Undershirt Crews 3-PackColor3 Polo BlackPrice$37.12MSRP: $49.50