Tyvek Himber Envelopes are great utility poker card size, double sided himber envelopes, brown color, made in very durable tyvek material.

They are made for switching and multiple outs:

Switch any freely chosen card into your force card
Use any two force cards and reveal either one as your prediction
Use two double face cards in one envelope to have four possible outcomes
Use any blank card with any words, symbols and numbers for the above applications
Force any prize, gift, prediction, bank night and any lucky themed routines

You can use two of them in your Magnetic Himber Wallet allowing for four outs yet the spectator will only ever see one envelope and one card.

Comes with 10 brown Tyvek envelopes. No instructions included.

Tyvek Himber Envelopes (10 Pack)