My employre supplies electricians with flame retardent work uniforms and when the uniforms come back from the laundry ( a national company ) the uniforms have a sandy grit in the pockets . I have talked to the uniform man and he said that he has no idea what the grit is. This is in all the FR clothing every week. My question is have those of you that wear FR clothing noticed grit in the pockets . It is my understanding that FR clothing is washed seperate from other clothing and this might be something we have to live with like there could be a filter breakig down in the laundry . THANKS HYPRESS>