Balaclavas are ninja; balaclavas are tough; balaclavas are warm; balaclavas are revolutionary; balaclavas are fashionable. Whatever you reason for wearing a balaclava, you don't have to go out and buy one. In fact, you basically already have one in your closet. Tying a T-shirt into a balaclava is an easy way to create a costume, make a fashion statement or just stay warm during winter bike riding. If you know how to tie a double-knot already, you are 90 per cent to your full face mask.
Put your head in the bottom of a T-shirt.
Pull the shirt so that your eyes are peering through the neck hole.
Pull back the sleeves of the T-shirt behind your head, and cross them over each other.
Pull the bottom sleeve up and over the top sleeve, and tuck it down next to your head.
Cross the ends of the sleeves again.
Pull the sleeve now on the bottom up and over the sleeve now on the top, and tuck the end through the hole formed by the sleeve-ends and the last knot.
Pull the ends of the sleeves to tighten the knot.
Tuck the bottom of the T-shirt collar in to make a clearer seeing-hole.
If you want the neck to be shorter, cut off the bottom of the T-shirt. Sometimes the knot is hard to tie because the sleeves are too short. Try using a long-sleeved shirt and cut off excess fabric from the sleeves at the end. Use a fleece or soft wool shirt to make a balaclava for added warmth.