I purchased this and cut a hole in the bottom to fit my lens. It rests against the glass and cuts all reflections. I use it on the plexiglass when my kid is playing indoor soccer as well!

https://preview.redd.it/665hbfa6dezb1.jpeg?width=1125&format=pjpg&auto=webp&s=8ecd1f02eaec5681046d7b5ba77ebf5a18f58472