Engineered mesh upper: Helps improve breathability The sockliner is produced with the solution dyeing process that reduces water usage by approximately 33% and carbon emissions by approximately 45% compared to the conventional dyeing technology AMPLIFOAM PLUS technology: Cushioning helps create a soft and flexible feeling underfoot Rearfoot GEL technology: Improves impact absorption and creates a softer feeling at footstrike Solid rubber outsole The GEL-SONOMA 8 shoe is designed for the great outdoors. It's a durable trail model that's made to provide good grip on off-road surfaces.Underfoot comfort stems from a full-length AMPLIFOAM PLUS midsole and GEL technology unit that's strategically placed where cushioning is needed. Lastly, the trail-specific outsole is functional for providing advanced traction. Its pattern helps you experience a confident stride on the uphill and downhill sections of challenging terrain.