Initially I was concerned that
Initially I was concerned that the bag was too small for its intended use. Turns out, it was the perfect size. I love that the pack attaches to the saddle rails and leaves the seat post free for my taillight/radar. After 150 miles, some on rugged gravel roads and single track, the pack remains securely attached, without rattling or need for adjustment. The only question mark is the longevity of the Boa system; only time will tell. Very pleased with this product.