Description of Boreal Flyers Approach Shoes - Women's Technical approach and easy climbs. Paths, trails and off-road. Street use. Features: 840 gr. pair. Size 4 u.k. Premium quality waterproof 2 mm Split leather Teramida SL. Integral padded tongue All round rubber protection New HFS padded heel system PU Air Net for ventilation and comfort Boreal PXF midsole Vibram Friction sole Rubber sole with dual density, shock absorbing EVA