Montrail - Sandia Peak (Pebble) - Women's: The Sandi Peak is built around Montrail's women-specific Integrafit last. This last was developed especially for women who need a narrow heel and supportive arch. The hallmarks of the Integrafit shape are also evident: smooth and even contact pressure over the instep, ample toe room, and solid medial support. The Sandia Peak has a softer pebble-grain upper and a more flexible sole making it ideal for walkers and day hikers who want more ankle support and rugged durability, but want to retain the easy flexible feel of a lighter-weight shoe. SLPU midsole maintains durability without added weight. IntegraFit women's-specific last provides a precision fit for their unique foot structure. Waterproof leather gives support and protection from the elements while maintaining breathability. Vibram Talon outsole. Shoe weighs 15 oz.