I had a Ruffwear pack that survived many adventures for 11 years. Because it wasn't designed for running, I only used it when hiking and would have to carry extra water galore while trail running with my dogs. When it was time to retire my old pack, I saw this vest and could not have been more excited! It's sleek design is more ergonomic and prevents jiggling and consequent chafing. The only thing I wish it had was a small handle, which I often utilized on my old pack when I had to quickly grab my dogs. The breathable mesh is perfect for my home's humid weather.