The N45 Is Designed To Keep You Cool On A Sunny City Trail Or On Dry Desert Rocks. The Construction Allows For Breathability And Abrasion Resistance, While Recraftable Vibram® Soles With Traction Lugs And Megagrip Save You From Slips. Featuring Ultralight And Durable Nitrogen-infused Endurofoam Midsoles, The N45 Has A High-energy Return That Feels Like You’re Walking On Air.