The uppers are made from split leather & AKUs amazing Air 8000 fabric. Air 8000 is a lightweight nylon fabric that due to its clever construction breathes 11 times better than traditionally constructed fabric boots. Backed up by a full Gore-Tex bootie lining for complete waterproofing the Slope GTX is ready to tackle all conditions. Vibram have produced the sole unit, an aggressive multi directional lugged pattern offers outstanding grip on a variety of terrain. Cushioning is provided by the lightweight exclusive dual density EVA midsole. Walking support is provided by a lightweight Texon & TPU lasting board that encourages a natural rolling action & flex point. The Slope then is perfect for just about anything from daily use, light work & general mountain walking & trekking.