The North Face - ThermoBall™ Traction Mule V. Color Gravel/Gravel. $59.00. 4.8 out of 5 starsAdd to favorites. 0 people have favorited this+5Brand NameThe North FaceProduct NameThermoBall™ Traction Mule VGenderWomen'sColorGravel/GravelPrice$59.00Rating5Rated 5 stars out of 5(65)