Wolfsnouts are super easy to breathe through.. And they don't interfere with your goggles. Thats becauve they are the only mask designed spesificly for off road racing and riding.
They are the best on a hot day because they provide max ventalation. The dust mask evalved! Breathe Beter - Ride Harder. Desert race tested and approived! Look for Wolfsnout in all of the big desert races!