Plush, responsive, fierce: The Icebug Arcus BUGrip GTX Running Shoe is nice to our stride and unrelenting on wintry trails. The upper's GORE-TEX Invisible Fit bootie shuts out snow and slush yet still lets our feet flex and breathe through every transition, while the sole's 13 metal studs have us striding atop ice as if it were asphalt. As we collect miles, the midsole's max-cush, dual-density foam softens every strike and energizes every toe-off, making us want to go farther than planned.