significant portion of the elasticity of the material is lost upon application of the protective suit to a user wearing a backpack only a minimal amount of stretchability needs to be retained during use of the garment to keep the fabric of the garment conformed to the backpack said another way only a minimum amount of recovery of the material of the backpack portion is required to keep the backpack portion conformed to the wearer fig2 illustrates that in some embodiments the backpack 50 terminates at the bottom edge 60 with a seal or seam that is generally perpendicular 90 degrees to the generally vertical outer edges 52 54 of the backpack 50 this configuration is not totally satisfactory in that during use contaminates tend to collect at the backpack seam at 60 this configuration has a 90 degree contaminate runoff angle the contaminate runoff angle is determined by measuring the angle formed by the outer edges 52 54 of the backpack 50 when the wearer is standing with the line formed by the lower termination of the backpack 50 this angle is denoted in fig2 and 9 at 62 in order to overcome this problem it has been found to be desirable to angle the lower backpack seam 60 downward as illustrated in fig9 this permits contaminates which fall in the gathers to run if liquid or fall if solid out of the bottom area and not collect therein in other words to affect runoff this contaminate runoff angle should be less than 90 degrees for.