Arc'teryx M AERIOS FL 2 MID GTXThe next gen Aerios FL Mid GTX delivers a better fit, improved ride, more secure lacing system, and with a 100% recycled polyester upper more sustainable material choices. The fast and light design is inspired by trail running footwear, then bolstered with a Vibram Megagrip outsole, compressed EVA midsole, and integrated TPU. Raised sidewalls add protection, the collar seals out debris and elevates support, and GORE TEX provides weather protection.