These full-body suits are essential for survival on Arrakis outside the cities. Their primary function is to preserve the body’s moisture by absorbing sweat, urine, and other body fluids. The stillsuit processes these fluids by filtering impurities, recycling captured fluids into drinkable water collected in catchpockets, which is drunk through a tube. The key components of the stillsuit are filt-plug (collects moisture from exhaled air), faceflap (face mask that protects the wearer from fine dust), catchtube (connects the catchpockets), and stillsuit cap or hood. As an Asset: An operable stillsuit allows the wearer to function for weeks in the desert by collecting water as it is lost by the body. Each stillsuit is finely-crafted, with multiple plated layers. The average stillsuit wearer loses 2.7 ml of water per day. Better Quality suits can reduce this.

Arrakis, Fremen, Survival