"The HFS is my favorite running shoe BY FAR!"Why 'HFS'?Well, it could be 'Hyper Fast Shoe,' or the 'Highly Flexible Sole,' or 'Happy Face Shoe,' or what many people say when they feel the light weight and comfort: 'H___ F____ S___.'There are as many answers as there are things you'll do in the HFS.Yes, it's a super lightweight, minimalist, barefoot-friendly, vegan road running shoe. But we know you'll do a LOT more in the HFS.Feel the air whoosh across your feet with the breathable, engineered mesh upper, and a silky smooth moisture-wicking lining.Get a burst of confidence when you feel the grippy the 5.5mm FeelTrue rubber sole with its tire-inspired tread.Handle turns securely thanks to the adjustable mid-foot and instep straps.And, of course, you'll turn heads with the HFS's look.At just 6.8 oz. ea. for a men's 9, you may forget you even have the HFS on!Like with all Xero Shoes, when you wear the HFS, you get the fun and benefits of what's NATURAL:Your feet are made to bend, flex, move and FEEL the world. One-quarter of the bones and joints in your ENTIRE body are in your feet and ankles; you have more nerve endings in your soles than anywhere but your finger tips and lips. Comfort and performance come from using your feet naturally.That's what Xero Shoes let you do. * Natural Fit -- wide toe boxes let your toes spread and relax. A non-elevated (zero-drop) heel for proper posture. * Natural Motion -- super flexible to let your feet bend and move naturally. Low-to-the-ground for balance and agility. * Natural Feel -- the patented FeelTrue soles give you just-right protection while still giving the ground feedback your brain needs for efficient, natural movement.Plus they're affordable and so durable that they have a 5,000 mile sole warranty.Buy your HFS today and Live Life Feet First!