Men's Skechers 246205 Aero Spark Running Shoes The Skechers Slip-ins: Aero Spark is a daily running trainer with hands-free entry and an adjustable lace front. A breathable engineered mesh upper helps keep the fit flexible, while the Arch Fit® insole system and HYPER BURST ICE™ cushioning support underfoot comfort. The Goodyear® Performance Outsole adds durable ground contact for running and training wear.