Go Totally Hands Free. Advance your strides in groundbreaking runners comfort with Skechers Hands Free Slip-ins: Aero Spark. Designed with specialized Slip-ins construction for runners, this innovative performance slip-on features streamlined interior material for reduced weight and friction, plus a premium high-performing heel counter for enhanced stability and a secure locked-in feel. Granted the APMA Seal of Acceptance, this daily trainer also boasts a breathable engineered mesh upper with adjustable laces, our removable Arch Fit insole system, HYPER BURST ICE cushioning with HYPER ARC technology, a carbon-infused H-plate for next-level energy return, plus a durable Goodyear Performance Outsole.