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infused with nitrogen
4oz (Men's US 9)
With a responsive Altra EGO™ midsole
New last makes for a more spacious forefoot
Men's Endorphin Speed 4 track infused with nitrogenSaucony Endorphin Speed 4 The Saucony Endorphin Speed 4 is crafted to take your running to the next level, whether you're pushing for a personal best on race day or conquering long training miles. This lightweight shoe merges innovative technology with exceptional comfort to help you run faster and farther. Equipped with a winged nylon plate, Speedroll technology, and PWRRun PB foam, the Endorphin Speed 4 delivers the ideal blend of support, energy
