Our XC+ (Extreme Comfort) collection gets even more extreme, designed with advanced details of comfort, performance, and durability you told us you value. The Chelsea boot of your dreams, with a sleek, sophisticated look and all the comfort you could want all day long. Waterproof leather or suede upper with seam-sealed construction keeps you dry even on soggy days. Leather lining. Double stretch gores and heel loop for pull-on ease. XC Fit™ enhances comfort at key touchpoints of the heel and arch. Light, contoured, removable XC Foam® footbed with leather cover delivers lasting cushioned support with high rebound. Slip-resistant rubber sole.