Looked at video of Mission and definitely is worth checking out unfortunately idk anyone than has a Mission. Does the air flow holes ice up at exit. I have had trouble with breath box hoses freezing on mod carry spare breath box. Like dfattack I sure would like to get away from snot mops. Mission $100 less than O2 but $200 more than Exome. I need to see one put it on. Thanks for suggestionMission helmet is awesome. All moist air goes out the back with air flow system. Not sure what parts would ever be needed. Check out their website. Purchased mine at Nielson Enterprises (ski doo dealer) in Lake Villa, Il.