With a one-size-fits-all, simple design, the Vario Speed is a great choice for guide schools, rock gyms and outdoor programs. Large quick-adjust buckle on waistbelt is pre-threaded and doesn't require doubling back. Quick-adjust leg loops. Constructed from wide nylon webbing.lso recommended for gym use. The Speed Vario weighs 412g. It covers a wide range of waist (23in to 42in;, 58 to 107cm) and leg (17in to 28in;, 43 to 71cm) sizes.