SRU-2WP RUBBER SOCKS.- The SRU-25/P rubber socks are supplied in eight sizes. The rubber socks are one-piece and are molded to shape to provide comfort and a good fit. The tops of the socks extend above the flight boots to reduce bulk and restriction.

The size of the SRU-25/P rubber socks will be governed by the size of the flight boot to be used. Usually, a rubber sock one size smaller than the boot to be used will provide an acceptable fit. The aircrew member should wear a pair of heavy wool socks, then put on a pair of SRU-25/P rubber socks corresponding to his normal boot size. The rubber socks should be worn in a slightly stretched condition to prevent wrinkles or bulk in the boot, but they must not be too tight. Larger or smaller rubber socks and/or boots may be required for a proper fit.

To fit the rubber socks, select the correct size of rubber socks and fit them to the CWU-62/P coveralls as follows:

1. Have the aircrew member put on the antiexposure assembly (except the hood, mittens, and flight suit), the MA-2 torso harness, if applicable, and a pair of properly fitted, heavy wool socks.

2. Mark the coverall legs and socks (L and R) on the inside and front and back. This is to ensure the socks are matched to the correct leg during installation.

3. Have the aircrew member sit in a straightback chair with his legs drawn back, heels directly below the kneecaps, and his feet flat on the floor.

4. Turn the top 2 inches of sock down, forming a temporary cuff. Mark the circumference of the coverall legs where they meet the

Figure 4-9.-Fitting the SRU-25/P rubber socks.

top of the folded socks (fig. 4-9). Have the aircrew member take off the coveralls. Remove the top 2 inches of the socks with a pair of sharp scissors.

5. Remove excess material from the coverall leg by cutting a line 1 inch below the mark that was applied in step 4. Ensure the leg is cut perpendicular to the lengthwise direction of the leg. Make your alignment marks at the front of the coverall legs and socks to ensure the socks will be properly aligned with the legs during the attachment process.

6. Turn the coveralls inside out and lay them flat, facing up.

NOTE: When you attach the socks to the coveralls, the right sock is on the right leg and the left sock is on the left leg.

7. Insert the sock into the leg opening, so that the right sides of the sock and coverall leg are facing each other, and the toe is pointing up (toward the front) (fig. 4-10).

Figure 4-10.-Attaching the rubber sock to the coverall leg.

8. Beginning at the front of the leg, make sure the alignment marks are matched. Then attach the sock with one row of stitches, onefourth inch from the cut edges, five to seven stitches per inch, using nylon size E thread. Overlap the stitching one-half inch. Do not backstitch.

9. Fold the cut edges of the seam over the sock. Make the fold as near the stitch line as possible. Apply one layer of 1 1/2-inch seam tape over the seam, keeping the stitch line and the cut edges as nearly centered under the tape as possible. Overlap the ends of the seam tape 1 inch.

10. Additional information on maintenance procedures, inspection cycles, and test equipment for antiexposure assemblies is covered in the

Aircrew Personal Protective Equipment Manual, NAVAIR 13-1-6.7.