Moisture that becomes trapped inside fly boxes can be damaging to flies. Replacing wet flies in your fly box or fishing in wet or humid conditions can cause hooks to rust and fly tying materials to deteriorate. This is particularly true with salt water flies. The new Dry-Tech MRT fly box uses Moisture Reduction Technology (MRT) to eliminate the harmful effects of humidity inside a fly box. Moisture from wet flies that generally accumulates inside is now soaked up continuously by unique absorbent crystals.
These crystals will dry salt water flies completely inside the box without corrosion. These crystals also maintain a constant dry humidity level of only 10-15% and protect flies from dampness at all times. This eliminates the deterioration of hooks, thread, fly-tying materials and extends the lifespan of your flies. A Humidity Indicator Test Strip is included with each box to demonstrate the effects and benefits of the MRT Design.