Ultrapress Purifier Cartridge Color:Black Bring the natural performance features

Bring the natural performance features of responsibly sourced ZQ-certified Merino wool with you on every hike in our Women's Hike Light socks (formerly known as PhD Outdoor)

and padded straps

She's raring to go

Can't decide between a hoodie or a henley

Using the Vario 2 locking mechanism

Ultrapress Purifier Cartridge Color:Black Bring the natural performance featuresReplacement 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.