Summit VECTIV Sky 2 / NF02502 These are lightweight trail running shoes designed primarily for short to mid-distance runs, emphasizing speed. They've been lightened by approximately 30g per shoe, with updated responsiveness and grip. They feature the "VECTIV" system, which converts energy during running into propulsion, promoting stable running. The sole unit incorporates a 3D carbon plate in a fork shape for stability and high responsiveness. The midsole features DREAM foam, which is lightweight yet highly responsive and provides excellent cushioning. The outsole uses "SurfaceCTRL" (with 10% natural rubber), offering high grip on both dry and wet surfaces. The upper material uses breathable mesh, and the lug design has been increased to 5.0mm, improving grip and operability. The wing-tongue construction enhances the fit, preventing foot slippage inside the shoe during intense ups and downs or when increasing speed. By reducing the thickness of the midsole, there's a better ground feel, making it suitable for high-speed running on uneven terrain, making it an athlete-specific design. *I ran about 10km on trails.* *There is almost no dirt, but I have lightly washed them.*