Is it really necessary to spend a fortune on specialized cooling gear to stay comfortable while training in the heat, or are there simpler, more cost-effective methods that can achieve the same results? Some people swear by using cooling towels, bandanas, and vests, while others claim that these products are nothing more than a marketing gimmick. Whats the real difference between using a $10 cooling towel and a $100 cooling vest? Are there any scientific studies that support the effectiveness of these products, or is it all just anecdotal evidence?