Break records and break more records in the Saucony Endorphin 2 track shoes! Predecessor: Endorphin. Support Type: Neutral. Cushioning: Lightweight, flexible response. Surface: Track. Differential: N/A. A versatile, featherlight track-and-field racing spike. FLEXFILM upper provides exoskeletal support with an ultralightweight, next-to-skin design. Lace-up closure. Thin comfort tongue and slightly padded heel cup. Soft textile lining supplies a great next-to-foot feel. Thin, removable insole. Four-spike configuration. Includes four metal spikes and spike wrench. Imported. Measurements: Weight: 4 oz Product measurements were taken using size 9.5, width B - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.