The Union Force bindings are super lightweight with workhorse dependability. Durability comfort performance & lightweight. everything you need & nothing you don't. Stage 2 Base Dupont Zytel ST Multizone Dupont Zytel ST Highbacks Extruded Anodized Aluminum Heelcups Quick-Adjust Forward Lean All-new 3D Direct-Connect strap system Multi-Layer Tapered Strap Core Tool-Free Size Adjustment Magnesium Buckles Universal Disks All-New Toe Cup Design Grade 8.8 Hardware Lifetime Warranty Base.