Review on 💡 Enhance Your GVS SPR321 Elipse with Replacement Filter for Optimal Performance by Eddie Gordon

Makes an excellent advanced replacement for standard mask cartridges. 2 things for those who are upset and gave it a bad rating.1. This pack contains filter cartridges for replacing cartridges in one (1) mask. It's pretty easy to understand once you actually read the description.2. They are more expensive because they contain a charcoal element to eliminate bad smells. Revain has regular half price ones if the charcoal element isn't an important feature for you. Fast and well protected delivery. They match the mask as expected.