Grizzly Drifter
300 miles and just over 3 weeks in the field in the back of a Can-Am Commander. We had dust, dirt, sand, mud, rain, snow, wind and heat. It got sat on, stacked on and tossed around. Zero leaks and zero dirt inside and that's without the waterproof liner in it. No issues with any zippers. Two frozen water bottles kept drinks and snacks cold and lasted the day even when it was mid 60s out. Impressed to say the least and would recommend to anyone. Check out Grizzly Drifter 20 or any of their other products for affordable quality that performs in a variety of conditions.