Ultrapress Purifier Cartridge Color:Black Stretch-fit makes them perfect for

Stretch-fit makes them perfect for rigorous activity mountain biking

dry insert

and you've got the right versatility to meet the cold on your terms

The folding knife also features our patented Virobloc locking mechanism which keeps the blade safely closed for transport or securely open while in use

Ultrapress Purifier Cartridge Color:Black Stretch-fit makes them perfect forReplacement 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.