Designed as a sporty safety, LEO and military-use frame, the Mt. Falcon is made of TR-90 material, making it lightweight, durable and safe. The Mt. Falcon features and open-bottom frame style which reduces fogging and sheds weight, and has adjustable, rubber-coated nose and temple-pieces ensuring a snug, comfortable fit on a variety of faces. The frame is ANSI z87 rated and is has passed mil-spec PRF-31013 testing. As featured by James from TFBTV.

Fit:  Medium with lots of adjustability via nosepiece and temples

Safety Rating:  Far exceeds ANSI z87

Lens Shape:  Open bottom

Interchangable Lenses:  Yes

Does it come with a case?

Yes, the Mt. Falcon comes with a utilitarian hard camo case.

How do you change the lenses?

https://www.youtube.com/watch?v=BlADbFUS0S0

Can I get bifocals or progressive lenses in this frame?

Unfortunately no.  For prescription, only single vision lenses are available for the Mt. Falcon.  If you are looking for a similar frame that is available with bifocal or progressive lenses then check out the Rudy Project Rydon or the Numa Optics Chisel.