Run further than you thought possible in the Men's GEL-NIMBUS 21 Running Shoe from ASICS. The premium mesh upper provides a secure fit, allowing air to flow and keep the foot fresh as you run. GEL technology in the front and back provides energized cushioning in the form of shock-absorbing silicone for heavy-impact activity. Meanwhile, FLYTEFOAM Propel technology in the midsole offers excellent bounce and toe-off. This lightweight foam formulation has a special high-energy return elastomer helping to put a spring in your step and the ASICS High Abrasion Resistance Rubber outsole delivers cushioning, lasting durability, and reliable traction. Jacquard mesh upper with synthetic overlays. Lace-up closure with discrete eyelets to disperse lace tension for a customized fit. Breathable fabric lining for great in-shoe feel. Removable Ortholite X-40 premium sock liner features higher rebound properties, excellent moisture management, and a high-level of breathability. Revolutionary FlyteFoam midsole provides continuous cushioning, underfoot support, and a lightweight, responsive ride. ASICS energetic foam formulation that provides supreme bounce thanks to a unique elastomer compound. Rearfoot and forefoot Gel Technology cushionging system attenuates shock during impact and toe-off phases, and allows movement in multiple planes as the foot transitions through the gait cycle. High abrasion resistance rubber (AHAR) outsole delivers cushioning, lasting durability, and reliable traction. Vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. Guidance Line technology uses a vertical flex groove to decouple the tooling along the line of progression for maximum stride efficiency. Guidance Trusstic System supplies enhanced gait efficiency without compromising mid-foot structural integrity. HG10MM Heel Gradient shifts body mass forward reducing the strain on lower limbs. Heel Clutching System(TM) is made up of an exoskeletal heel counter for improved fit and increased support. Support Type: Neutral . Cushioning: High energizing cushioning. Surface: Road. Weight: 13 oz. Spot clean. Imported. .