Polo Ralph Lauren - 4-D Flex Max Flex Boxer Brief w/ Rib Side Panel 3 Pack. Color Polo Black. Low Stock. On sale for $37.13. MSRP $49.50.. 4.8 out of 5 stars9 left in stock+2 colors/patternsBrand NamePolo Ralph LaurenProduct Name4-D Flex Max Flex Boxer Brief w/ Rib Side Panel 3 PackGenderMen'sColorPolo BlackPrice$37.13MSRP: $49.50Rating5Rated 5 stars out of 5(40)