SLP SLT II SKI BOTTOM (BLACK) - 15-6540Sold each Made of high quality UHMW plastic for a super strong, durable, and wear resistant ski Center keel features and hour glass design with a concave front to minimize tracking even on frozen, rutted trails Outer gull wings reduce darting, increase floatation, and increase turning ability Lightweight flexible loop is nearly indestructible and utilizes flush alloy fasteners