Comfortable enough to wear on long multi-pitch routes or during extended sessions at the gym, the Evolv Women's Elektra is built for all levels of female climbers. Redesigned for 2014 in two new colorways. Non-stretch Synthratek synthetic upper is vegan friendly. Durable and grippy 4.2 mm TRAX rubber. 2.2 mm TRAX duro-rand ties the sole to the shoe for sensitivity and power. Asymmetrical toe profile for powerful moves. MX-1 1mm sensitive teardrop half-length midsole for edging and support. Nylon lining and overlapping padded tongue for comfort. Slipper shape and performance without the uncomfortable pressure and crunch. These shoes will not stretch; order a size that fits snugly, but not too tight; EVOLV shoes are scaled so your U.S. street shoe size will usually give a snug fit.