Estudo de Calvino

A study that measures filter fiber differentiation

O último poço

Press release from the Last Well and Liberia clean water project

Ilha Marshall

Press release regarding the Marshall Islands Project

Montagem e manutenção do filtro de balde

User Guide and Maintenance Instructions

Cleaning Sticker (Spanish)

Spanish cleaning instructions for Sawyer filters

Instruções do filtro de balde Pointone

Sawyer filter cleaning instructions