10 OZ. BREATHER/BLEEDER PLY - #3100 is a 10 oz./sq.yd. non - woven polyester breather system used for even volatile evacuation from vacuum bags. It can be used at pressures up to 200 PSI (13.8 bars). Multi - directional conformability makes it a very efficient breather. This breather does not contain any binders which could cause seal-off of air flow. Width: 60". Sold by the yard.