The Xero Mesa Trail shoe is a ultralight, minimalist shoe that's perfect for trail running, backpacking, and fastpacking in the Sierras and beyond. The Mesa Trail pairs a lightweight, flexible sole with a wide toe-box so your feet have the freedom to move and flex naturally as you run or hike. The breathable uppers are super durable, and the outsole comes with Xero's 5000 mile warranty. Gnarly 3.5mm deep treads provide excellent grip while retaining a barefoot-feel underfoot. A men's size 9 weighs just 7.7 oz (218 g) per shoe. This barefoot style shoe is ideal for fastpacking and other fast and light mountain pursuits.