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Drawn from the exact profiles that are printed. Tap to open full size.

• Outer shell
  The hard case. Base and lid meet flush; the lid's lip laps the base, outside the shield.
• Your faraday fabric
  Trapped in a 0.6 mm gap between shell and liner, floor to rim. This is the shield.
• Liner
  The hard inner shell. Snaps into the outer shell over a bead and keeps what you store off the fabric.
• Bezel
  A rim cap on the base, a hem ring in the lid. Each pins a folded hem, so nothing is glued.
• The seam
  The base liner rises as a collar and the lid liner slides over it. Fabric meets fabric on the collar and again on the shoulder.

Any conductive ripstop works (nickel-copper is the usual one). . Where two flaps meet at a corner, overlap them. An overlap shields; a gap leaks.