The Rogue Fly by Montrail definitely reinforces the belief in doing more with less. Less weight makes for more speed and less bulk creates a more streamlined, breathable construction, encouraging less fatigue and more running time. You'll get more than you expected with this superb running shoe. Breathable mesh upper. Traditional lacing for an easy, secure fit to your preference. Horizontal and vertical flex grooves provide forefoot flexibility. Lightly cushioned footbed for more comfort and support. Low-profile, full-length compression-molded EVA midsole for better flexibility and improved response. Combined external TPU shank and Trail Shield for support and traction. Perforated outsole reduces weight. Full-length Gryponite outsole with three-point lug design for multidirectional traction. Micro 3-point lug design for incredible lightweight multidirectional traction. Measurements: ; Weight: 10 oz ; Product measurements were taken using size 12, width D - Medium. Please note that measurements may vary by size.