The Asics Gel-Nimbus 21 Men's Running Shoe features IGS (Impact Guidance System) technology, a construction technique that allows the shoe to adapt to your natural running style.
TRUSSTIC SYSTEM technology adds stability, so you can focus on improving your performance.
The famous GEL technology in the front and rear sole area offers you an energetic cushioning in the form of shock-absorbing silicone during strenuous activity.
The FLYTEFOAM propel technology in the midsole provides excellent fore-to-toe rebound and kick. This lightweight foam formulation features a special energizing, spring-loaded elastomer that gives your steps a bounce.
To ensure a great fit, the shoe has an external heel counter that keeps your heel down and gives you a good wearing feel as you travel miles and miles.

- IGS (Impact Guidance System) technology
- Jacquard mesh upper
- FLYTEFOAM Propel Technology
- FLYTEFOAM Lyte technology
- AHARPLUS heel plug
- TRUSSTIC SYSTEM technology
- External heel counter
- GEL technology
- SpEVA insole
- Molded EVA insole
- Heel clutching system
- Biomass FLYTEFOAM NANO technology

(Translated with Google Translate)