RunLite 2+ (21+ oz) - This fully ergonomically engineered RunLite system includes bounce-free Hybrid-stretch™ belt technology and integrated expandable front storage pocket. Two BPA-free 10.5oz bottles holds 21oz of fluid (can expand up to 64+oz) and integrates an additional removable 6"X4" Rapid Access Pouch with cool AirFlow mesh back channel. Add/remove SnapFlask, SnapGel and/or storage to meet your hydration and fuel needs at any time. Modules fit both 8 and 10.5 oz flasks. Belt adjusts to fit 26"-48" waist size.