The Eclipse has been the showpiece for Nike's Lunar technologies, and round 4 continues the trend with significant changes. The upper is engineered mesh, as in round 3, but here it relies less on the flywire strands for security, instead placing the Flywire within a saddle support of welded overlays with firm mesh over the top, and offset lacing to secure the foot.

The thermoplastic heel counter has been modestly beefed up, mores on the medial side. The midsole has been reshaped, narrowing the waist slightly, and reducing the firm feeling of the carrier foam. The forefoot has a concentric tree-ring like suspension that flexes to accommodate the foot's forefoot motion, and reduced carbon rubber in the heel saves weight. The overall effect is a comfortable and efficient motion stabilizing shoe.

Testers: “Good heel lockdown with excellent toe room. Good responsive ride that I put a lot of miles on.”

Sizes: Men: 6–13,14,15; Women: 5–12
Weight: 12.7 oz. (men’s size 11); 10.8 oz. (women’s size 8)
Shape: semi-curved
Construction: Strobel slip lasted, EVA Strobel board
Recommended for: medium to high-arched feet with mild to moderate overpronation

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