Nylon:  The nylon is UV stabilized high pressure tubing designed for direct burial as a feed line or can be used for the mist line.  It is always a good idea to "sleeve" the nylon tubing when burying it under concrete or flagstone.

Aero Mist has various sized tubing depending on your misting/fogging needs.  

     3/8" Black Nylon Tubing         3/8" Brown Nylon Tubing              1/4" Nylon Tubing

3/8" O.D. Nylon Tubing 50 FT Roll Black                    3/8" O.D. Nylon Tubing 50 FT Roll                  1/4"O.D.  Nylon Tube 50 FT Roll Black