The Specialized SL Body Geometry Footbeds. Ergonomically designed and scientifically tested to increase power, endurance, and comfort by optimizing hip, knee, and foot alignment. Specialized SL Body Geometry Footbeds Features Body Geometry Footbeds measurably increase power, reduce time to exhaustion, and reduce injury by aligning hip, knee, and foot. Customized longitudinal arch and metatarsal support Proprietary lightweight foam avoids taking a compression set for long-lasting performance. Combine Body Geometry shoes, footbeds, and wedges to maximize performance benefits.