New Balance Fresh Foam X 1080v14 vs 1080v15

The New Balance X 1080v15 is a major update to the New Balance Fresh Foam X 1080v14. After several years of relatively minor updates, the 15th iteration of the 1080 series replaced the entire midsole, getting rid of the actual Fresh Foam and replacing it with a bouncier, supercritical component that New Balance calls Infinion. This makes the v15 a much livelier daily trainer, with more cushioning in the heel. While it's a worthwhile upgrade over the v14, it's not without tradeoffs: the softer foam of the v15 bottoms out a bit faster during long runs, and the forefoot doesn't provide as much protection against heavy impacts.