The BeFree 1.0L is suitable for the occasional use. It is lightweight (63g) and portable for on-the-go adventures. This filter removes bacteria, cysts and sediment with its pore size of 0.1 micron (0.0001 mm). The collapsible flask packs small to fit into tight spaces such as running shorts, cycling jerseys, paddling or fishing vest. Output is up to 2L/min with a total capacity of 1000L, depending on the water quality. Easily clean the EZ-Clean MembraneTM by simply shaking or swishing the filter in the water – in the field or at home. No backflushing or tools necessary. 100% PVC and BPA free.