Replacement Lens Typ
There is since the beginning of 2022 the new Rex Specs V2. Lenses of the new V2 are not compatible with the lenses of the first version.You can tell which version you have by the positioning of the Rex Specs lettering.
If the Rex Specs lettering is embossed in the frame, you have the new improved version V2.
If the lettering is on the lens you have a dog goggle of the version V1