Pit Viper The Frank RIG (Retention Improvement Gear)

I do a lot of mountain biking and these keep my Pit Vipers on my face no matter what. Finally no more grabbing them mid-jump.

Simple design but very effective. The strap is comfortable and doesn't pull on my ears. Great add-on for active use.

I was skeptical about this, but it's become essential for my runs. The glasses don't bounce or slip. Very impressed.

It does the job, but the material feels a bit cheap. It works, but I expected a bit more for the price.

I use these on my boat and they keep my shades from flying off when we hit waves. Secure and comfortable.

The RIG works well, but it took a few tries to get it adjusted right. Once on, they stay on. No complaints.

For $12, this is a no-brainer. My glasses used to slip down my nose when I sweated. Now they stay put. Highly recommend.

The strap broke the second time I used it. Maybe I got a bad batch, but it didn't hold up. Disappointed.

This is exactly what I needed. I wear my Pit Vipers when playing sports and they used to bounce around. The Frank RIG fixes that. Simple and effective.

Works well and doesn't interfere with the fit. Only slight downside is it can be a bit hard to adjust, but once it's set it's great.