KEEN - WK400 Performance Breathable Walking. Color Martini Olive/Black. On sale for $156.35. MSRP $169.95.. 3.0 out of 5 starsAdd to favorites. 0 people have favorited this+2Brand NameKEENProduct NameWK400 Performance Breathable WalkingGenderMen'sColorMartini Olive/BlackPrice$156.35MSRP: $169.95Rating3Rated 3 stars out of 5(1)