I have been using Totobobo masks for 4 years now while living in Hanoi, Vietnam. The air pollution on the roads and in the winter is quite bad here, but Totobobo masks work great to cut down my exposure while riding my motorbike around the city and on longer trips. I prefer the “supercool” style of Totobobo mask because it really is cooler in the summer. Also, I have a big nose which can be tricky to get a good fit with any mask, but I don’t have to worry about that at all with the SuperCool design. I also am an environmental consultant, so I pay careful attention to environmental health related problems and solutions. I researched many masks, but still feel Totobobo is the best mask I can get.