Wet sidewalks and muddy trails dont stand a chance when you wear the New Balance Summit Unknown GTX trail runners. Predecessor: N/A. Support Type: Neutral. Cushioning: Lightweight, flexible response. Surface: Trail. Differential: 10mm. Breathable, no-sew mesh construction. Traditional lace-up closure for a secure fit. Lightly padded tongue and collar for comfort. GORE-TEX lining provides waterproof protection. REVlite foam midsole creates a lighter, faster response. Toe Protect adds extra protection against rocks and bumps on the trail. HydroHesion rubber outsole provides additional grip on wet surfaces. Spike lugs provide extra gripping power. Country of origin. Measurements: Weight: 7.8 oz 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.