Make a Ninja Mask out of a T Shirt

This article will teach you how to make a ninja mask out of a t-shirt.

Steps

Find a T-shirt. The colour all depends on your surroundings. Preferably dark blue for this will not be seen as easily as a black t-shirt or any other bright colour.
Turn t-shirt inside out.
Place the t-shirt over your head so that the collar is covering everything except for your face.
Raise the collar from below your chin to over your mouth and nose.
Fold both top and bottom collar over for a more streamlined design. This also covers the shirt tag.
Tie the two sleeves of the t-shirt behind your head and then you have your ninja mask.
Finished.

Cotton t-shirts are preferable.
Wear colors appropriate for your surroundings(i.e. white mask in snowy conditions, dark blue or gray mask at night).
Be sure to tie the sleeves in a secure knot.

Do not use your mask dishonorably.
Be careful where you wear your mask; it will most likely raise suspicion in public.