Fulling Mill says:

Tactical Dry Fly dub is a fully synthetic dubbing dyed, treated and blended to match the hatch.

• Micro synthetic fibers, very soft, easy to dub and suitable for tying the smallest of Dry flies
• Tactical Dry treatment to prevent water saturation
• Tactical Dry fly dub is the ultimate fine dubbing, suitable for tying all Dry flies, from the tiniest Midge up to large Terrestrials and everything in between. Also suitable for Micro Midge patterns
• 1 gram per pack