Gregory Running Backpacks
Running backpacks come in different volumes and fits, including women's specific. They are designed to be light and sit nicely on your back without digging in anywhere, stabilised on your body by chest and waist straps. The waist strap often has pockets attached, which increases stability and allows you to have your most important items within easy reach. Most backpacks can be compressed to a smaller size if they're not totally filled, to reduce bounce. They all have space for a drinks bladder, or you can go for a hydration pack with the bladder included.