Women"s New Balance, WX877 Cardio Comfort athletic Shoe A great new multi-sport athletic style with a lightweight design Synthetic and cool mesh upper with a no-sew design Featuring cardio comfort a premium dual-density insert - a super-supportive footbed with lightweight construction Removable cushioned insole Ndurance rubber compound outsole for maximum durability in high wear areas also with an additional pivot point on the sole for a more energized workout