Ultrapress Purifier Cartridge Color:Black This user has the need

This user has the need to run the lamp on alkaline batteries if caught away from a power source for a long backpacking trip

Stretch-fit makes them perfect for rigorous activity mountain biking

dry insert

holding a fall

Ultrapress Purifier Cartridge Color:Black This user has the needReplacement purifier cartridges for the UltraPress are designed to last 300 cycles (40 gal. 150L). Lifespan will decline when purifying water with high levels of silt, sediment or tannins. Cartridge press time increases towards the end of the cartridge lifespan; when press time reaches 25 30 seconds, the cartridge should be replaced. Cartridge continues to protect, even as press time increases.