Feeling 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. Measurements: Weight: 8 oz Product measurements were taken using size 8 width B - Medium.Weight of footwear is based on a single item not a pair.