Morakniv Companion Fixed Blade Outdoor Knife with Stainless Steel Blade, 4.1-Inch, Military Green

The filter element is 0.2-micron silver-impregnated ceramic — ceramic doesn't degrade chemically over time the way hollow-fiber or activated carbon filters do. The ceramic element is rated for 50,000 liters before replacement and can be field-cleaned by scrubbing with the included brush to restore flow rate. The silver impregnation inhibits bacteria growth inside the filter. The aluminum body is anodized, not coated, and won't chip or peel. Katadyn has been making these in Switzerland since 1928. Humanitarian organizations use the Pocket because it works for decades in the field without specialized maintenance.

The Whisperlite International burns white gas, kerosene, and unleaded gasoline — any liquid fuel worldwide, which makes it the stove of choice for expedition mountaineers and long-distance travelers. The all-brass and stainless steel construction has zero plastic in the fuel delivery system. The shaker jet cleaning mechanism clears clogs without tools — you shake the stove and a wire inside the jet clears the orifice. MSR has been making the Whisperlite since 1984 with minimal design changes because the original design was already this good. Every component is individually replaceable through MSR's parts program.

The XTherm's 4.5 R-value comes from Therm-a-Rest's Triangular Core Matrix construction — horizontal baffles with a reflective film that blocks radiant heat loss from the body through the pad to the ground. The shell is a 30D nylon with ThermaCapture coating on the interior surface. The pad inflates to 2.5 inches of air insulation for a 13-ounce weight. Therm-a-Rest pioneered the self-inflating pad in 1971 and manufactures in Mukilteo, Washington. Their warranty covers material defects and they publish repair kits for field patching.