Forging creeks, crossing bogs, and scrambling on rocks are no problem with over-the-ankle support and waterproof full grain leather uppers. The stylized lead patterned side panels set this Siren apart. A slip lasted athletic fit, Ortholite anatomical footbed and womens-only Q-Form footframe make all that scrambling comfortable, and a Vibram sole makes each step sure and sold. Slip Lasted Construction. Full Grain/Synthetic Leather and Breathable Mesh Upper. Injection Molded TPU Heel Protection. Bellows Tongue. 7.5mm Narrow Gauge Webbing. 4.5mm Ortholite Anatomical Footbed. Nylon 6.6 Injection Molded Arch Shank. Q-Form Triple Density Compression Molded EVA Footframe. Merrell Air Cushion Midsole. 6mm Sole Lug Depth. Vibram Siren Song Sole/TC5+ Rubber.