Ultrapress Purifier Cartridge Color:Black extremely packable and ultralight-the lightest

extremely packable and ultralight-the lightest Gore-Tex gaiter on the market-so you can carry them with you when every ounce matters

function and soft stretch

Stretch-fit makes them perfect for rigorous activity mountain biking

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

Ultrapress Purifier Cartridge Color:Black extremely packable and ultralight-the lightestReplacement 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.