Nope! Please bear in mind that these are two different products.
U-Mask Model 3 has followed a different regulatory path compared to U-Mask Model 2.2., having been certified as reusable Category III PPE (Personal Protective Equipment) - FFP2 R D - with reference to both elements of which it is composed (outer cover + inner filter). Masks certified as FFP2 must display the FFP2 marking on the outside to identify them. For this reason, it is not possible to use the outer cover of the U-Mask Model 3 - FFP2 certified - with a U-Mask Model 2.2 inner refill - certified as a class I medical device belonging to the category of surgical masks, just as it is not possible to use the external cover of U-Mask Model 2.2 with a U-Mask Model 3 inner refill; in the latter case, in fact, the regulatory standard for FFP2 masks would not be respected.