Platypus B-Line XC 8

Platypus says:

Made for a full day of riding cross-country singletrack, the low-profile B-Line XC offers a comfortable carry mile after mile. Tailored specifically for women, it comfortably carries 3 liters of water with the new fast-flowing, taste-free Big Zip™ EVO reservoir while leaving sufficient room for packing. The RidgeAir™ back panel ensures plenty of airflow for cool-riding comfort. Available in 8.0L & 12.0L sizes.