Hi everyone, We've been getting a mini-heatwave here in Toronto and it's been flaring up my asthma (largely because of the smog and other crap that's ended up hanging in the air). I've been contemplating getting one of those Respro Techno Masks ( http://www.mec.ca/Products/product_detail.jsp?PRODUCT%3C- %3Eprd_id=336047&FOLDER%3C%3Efolder_id=579959&bmUID=1056466787282 ). I just have some questions about these things: 1. Has anyone else used these (I assume that someone has) and how do they work? 2. How are they in hot, humid weather (anything about 30 Celcius)? 3. How do you manage drinking water (my route is 1 hour each way for commuting; on weekends I do at least 2 hours each way for biking around)? 4. I use a whistle. I gather that is out with this. Does your "dingy bell" do enough? Anyways, those were my questions off the top of my head. Any advice/suggestions you can give would be greatly appreciated.