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High density ball provides aggressive deep tissue massage to IT Band
Glycerin GTS 21 vs Glycerin 20
A Hypoknit upper is designed to provide strategic areas of stretch and support
The cushioning provides a plush underfoot feel without being overly soft
MEN'S ENDORPHIN SPEED 5 Color:White - Mutant (97) High density ball provides aggressiveOverview & Purpose The Endorphin Speed 5 is a plated tempo fast training all rounder shoe: its not a full carbon plate super shoe, but it includes a flexible nylon plate to inject some snap and stability. SAUCONY positions it to handle everything from workouts to long efforts, while retaining comfort for everyday miles. Its the successor to the Speed 4, with tweaks rather than wholesale redesign. Specs & Key Features Below are some of the technical
