I've submitted this before, but it works so well for me and my family that I'm going to repeat it. In addition to a regular bandana or handkerchief , I take a well washed, standard size, yellow or orange, cotton bandana and press it with a very hot dry iron, folding it and pressing it to pocket size. I immediately slip it into a (sterile) Gerber Breast Milk Bag, press out the air with a flat book and seal it. I now have a nearly sterile bandage, dust mask, signal flag, sweatband,etc. I reinforce the bag edges with Gorilla Tape to foster pocket durability . Lastly, I make a four inch flat roll of forty inches of two inch Gorilla Tape and tape the flat pack to the bandana bag. This gives me tape for all the obvious uses and the possibility of making an effective chest seal bandage. It really packs amazingly flat and is almost weightless. It will also anchor your wallet in your front pocket and make pickpockets cringe. Try it. I think you'll like it!