A neck gaiter is simple piece of synthetic material that is sewn into a tube. Many people refer to them generically as a Buff. Neck gaiters are one of the most versatile and useful pieces of running equipment you can own.
First off, neck gaiters cost a little less than a beanie would cost and can be used exactly like a beanie plus about 10 other ways. One of the main reasons runners love neck gaiters is because they are extremely portable. When you are not wearing a buff you can very easily wrap it around your wrist and it then becomes something to wipe your brow with as you warm up.
Neck Gaiters are useful in both warm and cold temperatures unlike a beanie. They can also be worn during other sports. They are great to wear under helmets when skiing or cycling. Check our review/preview of the neck gaiter.