The Boreal Lady’s Aztec is a waterproof approach shoe for cooler conditions. Protection for rain and snow. Great for trekking along paths, trails and off-road. General Travel and approach shoe.LININGBoreal Dry-Line® FLS for absolute waterproofness+ stay cool breathability.MIDSOLEBoreal PXF.Vibram Skyrunning rubber sole with shock absorbing EVA.Premium quality waterproof 2 mm Splitleather with Teramida SL. Integral padded tongue and rubber toecup for protection. HFS padded heel system for a perfect fit.778 gr. pair. Size 4 u.k.