The North Face - ThermoBall™ Traction Mule V. Color Gravel/Gravel. $58.95. 4.8 out of 5 stars+5Brand NameThe North FaceProduct NameThermoBall™ Traction Mule VGenderWomen'sColorGravel/GravelPrice$58.95Rating5Rated 5 stars out of 5(36)