I use these in San Diego for commuting, grocery shopping, and long day rides to carry extra clothing and food. The capacity is greater than I expected which is helpful when I've gone grocery shopping hungry. The attachment clips are easy to use and the packs stay in place well even when riding on uneven surfaces. The fabric seems very durable and will keep out a light to moderate rain. I'm not sure about using them in really wet climates though? Overall a great set. I'm thinking of getting another set for my daughter who commutes to work.