Product Information SKU: #8906318Feeling a need for speed? The performance-boosting Sonic V1 takes your running game to another level.Predecessor: None.Support Type: Neutral.Cushioning: Lightweight, flexible response.Surface: Road.Differential: 6mm.Super-breathable and cooling air mesh uppers.Bootie construction with a stretch topline.Lightly padded tongue and collar.Features a Boa? Fit System closure at the lateral side of the tongue strap for a secure and adjustable fit.Soft breathable linings.Foam cushioned Fuel Core insole.REVlite midsole foam provides lasting, responsive cushioning with every stride. Durable rubber outsole.Imported.Product measurements were taken using size 8, width B - Medium. Please note that measurements may vary by size.Weight of footwear is based on a single item, not a pair.Measurements: Weight: 8 oz