The Frontier Filter Pro includes a 28mm thread adapter to attach directly to standard water bottles & bladders, and a tube adapter to attach directly to hydration packs for filtered water anywhere.

• The Frontier Filter Pro includes a 28mm thread adapter to attach directly to standard water bottles & bladders, and a tube adapter to attach directly to hydration packs for filtered water anywhere.
• With included adapters, filter can be used with bottles, bladders, hydration packs, or directly from water source
• 3 replacement pre-filters
• Provides the benefits of a larger bottle filter in a convenient and compact size
• Flexible Integrated Strap Grip secures cap to filter when not in use and allows for easy cap removal