I rode across Canada and in one instance I rode two months straight with a mask and a pair of goggles. ⁣ ⁣ I was climbing some big mountains that required big oxygen intakes from the effort. Google: Roger’s Pass, Summit Pass and the worst Duffey Lake road to name a few. ⁣ ⁣ NEVER did I feel restricted except that perhaps a bicycle with gears would have made my life easier. ⁣ ⁣ (If you will joke that I have big nostrils thererore it is easier for me, you are not that original. I have heard that one since my pre-teens so try again 😎)