The LG-090 laser safety glasses are designed to protect against Holmium lasers operating at 2100 nm with an OD 5+ level of protection which equates to 100 thousand times reduction in laser power. They are a universal fit that works well with or without prescription glasses underneath. In addition to 2100 nm they also protect against CO2 lasers with an OD 6+. More information can be found via the below link. If you have any questions feel free to contact us at info@dioptika.com and one of our laser safety experts will be happy to help.

Lightweight 2100nm Holmium & CO2 Laser Safety Glasses - Fitover (certified-laser-eyewear.com)