This newer version of the Unbelievalope has added a built-in index, adding the multiple-out function to the Sam Berland envelope reveal, making it an excellent platform effect.

The self-contained kraft window envelope allows you to show a playing card, piece of paper, or any such object inside and be able to visually switch it for any of the hidden outs (easily have 10-13) inside… making an excellent and direct prediction effect.

The manufacturer accurately describes the effect this way: “A prediction is clearly in view inside the envelope window. It could be a note, a playing card, a bill, or billet. It can then be switched -- undetected, seamlessly, and invisibly. The spectator can be burning your hands -- and they still will not see it happen.”

Comes with the original Unbelievalope, a matching regular envelope, the new version with the index option and access to an online video tutorial. The envelopes are 7.25” x 4.75” and made of durable kraft paper. Manufactured by Theory 11.