All-New 3D Direct-Connect Strap System Multi-Layer Tapered Strap Core evenly distributes pressure. * Stage III Atlas Base This base is made of Dupont� Zytel� ST and is guaranteed against breakage with * Multi-Layered Tapered Strap Core * All-New Extruded 3D Aluminum Heelcups This process removes material to reduce weight but maintains s * Symmetrical Atlas Highbacks Symmetrical, yet tapered towards the top, providing flex and tweakabilit