I measured the particles coming off of new- unused clean room coat. Tyvek, Convertors, Allegiance #9393 measured 10 counts of 0.3 micron at 1 minute and 0 count at 7 minute.
The 0.5 micron size measured 0 at both times. Jenne's used coat measured 20 counts of 0.3 micron and 0 counts for 0.5 micron at 1 minute. ( counts / cf- min)
The HEPA tent background is consistently 0 when it's CP STAT 100 curtains are closed.