I believe mine are wonder lube and I knoware made of pillow ticking. My brother gave them to me bust Ilost the tag attached to them showing company manufactureand thickness. The pillow ticking patchis tough(tightly woven).I startedshooting them in my .54 TC Firehawk last yearwith 100 grains of APPwith no burn through. I was using some of the gold roundballs from Remington for .54 caliber. I picked some of the patchesup at the range after being firedand they just showed some black in the center and very little of that. I had no cutting or shredding. I could almost usethem again. I was getting real good groups too.