Duc, It's cotton. Kinda stiff at first, but I feel like it will be like an extremely tough t-shirt feel once it's washed a few times. I believe from what I've heard about ASAT it is tougher material than theirs. Just from what I've been told. These are the coveralls with 6 pockets and vent holes like regular coveralls. Zip up the front and also have 2 snap buttons on front. Ties at the cuffs. Oh and they also have extra material under the arms sewn in to facilitate stretching. (as in full draw)

LT