When the environment sets the rules, the Extrema Ratio Outdoor series is built to keep working as long as you do. Designed around a simple principle — when you’re outdoors, excess is a burden — this line focuses on essential performance.
Green handles for low visibility in nature. Stonewashed blades for easier maintenance. High-visibility paracord for quick recovery. Durable, minimalist sheaths. No unnecessary extras. Just reliability, quality, and performance.
The Sethlans S600 Outdoor
Based on the proven Sethlans platform, the S600 Outdoor is a fixed blade developed for bushcraft, survival, and extended field use. It is built for repeated work on wood, cordage, and natural materials — where control and durability matter more than appearance.
The full tang construction ensures maximum strength and structural continuity, eliminating weak points. The stonewashed blade finish resists wear, tolerates dirt and moisture, and simplifies maintenance in demanding conditions.
Green G10 scales provide a secure grip, even with wet or tired hands. The removable scales reveal a skeletonised frame for weight reduction or paracord wrapping. An orange lanyard improves visibility if the knife is dropped in vegetation or rough terrain.
The knife comes with a lightweight Kydex sheath that does not absorb water and requires minimal maintenance. It can be configured for right- or left-handed carry and adapted to different setups, including MOLLE systems, belt clips, Ulticlip, Malice Clip, or shoulder carry.
