1.Cut flap with almost the same dimensions as the shirt pocket (Netting material is prefered).

2.Stitch the flap on inside part of the shirt pocket, it should be placed
1.5 to 2 cm below the top level of the pocket as shown in figure 1.

3.Secret flap is now ready.

4.Valuables can now be placed under the flap by raising it from the bottom end.

5.Refer FAQ for further clarification.

If You are too busy to make one