The Extend replaces the Diffuse, which was the hidden jewel in the Nike Speed line. The Extend is a substantial daily trainer, but has a flexible, light feeling and a well cushioned ride. The heel is well supported above the sole with a thermoplastic heel counter, while it is protected below by a substantial polymer pad insert, injection-molded Phylon, and Nike’s most durable encapsulated Air in the heel. The technology trickled down to this shoe allows the efficient, high mileage runner on a budget to train with confidence.
Neutral Cushioning • Sizes: men 6-13,14,15; women 5-11,12 • Weight: men 12 oz. (size 9); women 10.1 oz. (size 7) • Upper: mesh/synthetic overlays • Midsole: Phylon, heel Air unit • Shank: Thermoplastic • Outersole: Duralon forefoot, BRS 1000 heel • Shape: semi-curved • Construction: Strobel slip last • Strengths: flexible, well-cushioned • Recommended for: high- to low-arched feet with neutral biomechanics.