Designed and tested by DVS team. Triple stitch construction. Perforated foam for heat reduction. Highly flexible lasting board construction. Open-cell breathable mesh upper. Contoured heel cup sockliner. Lightweight flexible rubber cup sole. Non-slip gum rubber outsole. Measurements: Weight: 1 lb 3 oz Product measurements were taken using size 12, width D - Medium. Please note that measurements may vary by size.