Sof Sole Insoles Unisex FIT Support Full-Length Foam Shoe Inserts improve footwear fit, cushioning, and comfort. Available in three arch heights, the full-length, removable foam shoe insole features a reinforced nylon plate to support the arch and heel, and promote anatomical alignment. High-rebound foam promotes a natural stride—each arch height has a different, specially-calibrated foam density (measured in durometers, the metric for material hardness—softer foam has a lower durometer, while harder foam has a higher durometer) for proper biomechanics. The Sof Sole Insoles Unisex FIT Support Full-Length Foam Shoe Insert is ideal for everyday support, or for walking, running, hiking, and cross-training. Low Arch insole has a 2.8cm arch height, and 65 durometer foam in heel and arch/40 durometer foam in forefoot. Neutral Arch insole has a 3.0cm arch height, and 60 durometer foam in heel and arch/40 durometer foam in forefoot. High Arch has a 3.3cm arch height, and 55 durometer foam in heel and arch/40 durometer foam in forefoot. Available in a range of men’s and women’s shoe sizes.