Avia Women's A5643W 100% Leather, synthetic and mesh Synthetic sole Breathable mesh upper - For breathability and a comfortable fit. Combination Leather and Synthetic Leather Overlays - For additional support, improve fit and durability. Plush Tongue and Collar - For added comfort. Removeable Moulded EVA Sockliner - for soft underfoot comfort. Lightweight Moulded EVA Midsole - With Release Lite technology provides responsive cushioning.