Peak Series Activated Carbon Filter Attachment Size:One Size They're made of all-cotton canvas

They're made of all-cotton canvas

Soft rib-knit-trim at the cuffs feels comfortable and easy on the skin

Burn time flash mode

The lower inertia of wire gates means less flutter and shutter

Plus it’s totally water-friendly and ready to shred

Peak Series Activated Carbon Filter Attachment Size:One Size They're made of all-cotton canvasLifeStraws Peak Series activated carbon + ion exchange filter attachment protects against lead, mercury, chromium III, cadmium, copper and other heavy metals. In addition, it reduces chlorine and bad odors for improved taste. This highly versatile filter is designed to be attached to the LifeStraw Peak Membrane filter. COMPATIBLE WITH MULTIPLE SYSTEMS: Designed for seamless use with LifeStraw Peak Series collapsible squeeze bottles, solo water