I'm cursed (or my wife is, we still have to figure it out) because it rains wherever we travel to. It wasn’t any different during our trip to Utah and Arizona back in May 2015 (it even snowed!). We love to hike and we often end up taking the hardest and most strenuous trails possible so I bought a pair of small microfiber absorbent towels. The initial purpose for having them was to wipe off sweat from our heads and hands but I ended up using these microfiber absorbent towels for something else... you've probably guessed it! I was caught in a very heavy rain while shooting long exposure at the Virgin River in Zion National Park. My Nikon D610 and 24-70mm f2.8 lens were completely wet and even though they are both weather-sealed to a certain degree, I was still afraid that something could have happened to the equipment. I pulled out the absorbent towel immediately after finding a shelter and I wiped the camera and the lens thoroughly.
I'm obviously not a marketing manager for microfiber absorbent towels and I don't know the technology behind these towels but I was really amazed how quickly and well they absorbed water from my photo gear. I think that if I tried to wipe it off with a regular towel, it could actually push water into small cracks and spaces in my camera and lens. However, the absorbent towel 'sucked in' all the water! From now on, I take at least one microfiber absorbent towel for all of my photo shoots. They are really small, lightweight and inexpensive. This is the one I got (12x24 inches) but of course you can find different ones from different companies: http://www.amazon.com/gp/product/B00MGGZE52