Vortex Optics GlassPak Sport Binocular Harness - Streamlined. Silent. Functional. The GlassPak Sport is designed for the minimalist who demands all-day comfort and fast access to gear when seconds count. Quick, One-Handed Operation: lets you keep your eyes and hands on what matters most; Easy-adjust harness: delivers a quick, custom fit; Quick-release buckles: for getting hunt-ready in a hurry; DWR Treated Exterior: protects your binos from the elements; Quiet, Microfiber Interior: eliminates noise and provides extra padding;