Electro-Static Discharge. If you’ve never heard of it than you don’t need these bags. If you do know what they are, you know that as a stock item they only come so big and then you are out-of-luck. Until now you had to suffer with bags that didn’t fit and therefore did not really give you ESD protection. We can make ESD bags to your exact size requirements and in any quantity you want from one to whatever.These bags are heat-sealable and can be UPS’d anywhere in the world.