Evolv Elektra Climbing Shoe (2014) - Women's Synthetic Profile: Asymmetrical Upper: Synthetic (perforated Synthratek upper); Lining: Nylon (comfortable and plush) Midsole: MX-P: 1mm sensitive half-length Rand: VTR rand (thick front toe area) Sole: 4.2mm TRAX&reg; high friction rubber