Pushing your limits on the trail is a lot easier if you have something to drink. The DAKINE Women's Amp 12L Hydration Pack was built for serious female athletes to carry just the essentials, such as repair kits, media players, sunglasses, and maybe some snacks. The low-profile design and women-specific contoured harness means the Amp 12 won't sway as you're turning corners or climbing up rugged terrain. Other features include a secure helmet carry, a deployable rain cover, and a removable waist-belt.
Strengths: The inside compartments are awesome and they help keep everything in place, thus easy to access when you need something.
The days of hanging my helmet from the handlebars are far gone, the helmet carry strap is great.
Straps don't crush your boob.
Carrying a pack after riding for several hours can become uncomfortable and heavy, but this pack has great back support.
Weaknesses: Choices of colors. Price
I would definitely recommend this hydration pack to fellow biking girls out there. It's design is actually inspired in the female body. It's not just a "make it small, and put pink flowers" kinda thing.