These must be leather. They cannot be made of rubber or synthetic material, except for Vibram soles. Lightweight hiking boots with nylon uppers are not acceptable. No synthetic clothing. This means you must only wear wool or cotton underclothing, socks, tshirts, pants, etc.
Synthetic clothing can melt in high temperatures.
It is approximately 30 miles from downtown Fairbanks to the research site. From the Fairbanks International Airport, take Airport Way east through town. The second left after the big rocket sign is a small unmarked gravel road. This bridge has a locked gate. Get the combination from Larry Hinzman before going.