The Arc'teryx Aerios FL 2 Mid GTX is an agile and supportive GORE-TEX shoe designed for extended hikes on technical trails. The 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, and it's 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 a GORE-TEX membrane provides weather protection. GORE-TEX provides waterproof and breathable performance Vibram MegaGrip rubber compound is durable and grippy Compressed EVA midsole provides lasting cushion and support Toe cap adds protection and abrasion resistance Optimized mid height provides ankle support Winter 2022/23 product Equipped With GORE-TEX GORE-TEX is an extremely thin membrane that’s durably waterproof, windproof, and breathable. It has over nine billion pores per square inch that are each 20,000 times smaller than a water drop, while being 700 times larger than water vapor. This means that rain won't get through the membrane, but that perspiration vapor can escape through the membrane. Different iterations of this basic membrane principle are used in a variety products throughout the outdoor industry. Vibram MegaGrip Vibram MegaGrip is high performance rubber compound formula, developed for hikers, fly fishers, and other users, who frequently encounter slippery surfaces. Vibram MegaGrip offers excellent grip on wet, muddy, and slick surfaces, as well as incredible durability for long-lasting traction.