The buckle on the Helium sucks. More precisely, the buckle’s inability to retain strap tension is a problem. When out for longer rides, especially hot rides where you are sweating, the straps loosen considerably. On one long climb, the straps loosened so much I was able to get my chin under the heavy buckle as it swung – which popped the thing clean off. However, the company will gladly replace the buckle at no charge if you have such a problem.