Hello cocoonedGeoriga,
Vinyl tape mummification would be my choice for you, and it would be done as follows:
1) Plastic wrap is wound loosely around each arm, from your armpits to the tip of your fingers
2) With your arms on your sides, plastic wrap is wound around your body, from your shoulders down to your ankles
3) Black and shiny 2 inch wide vinyl tape is wound snugly and meticulously from your shoulders down to your ankles
4) A huge sock is stuffed in your mouth
5) Microfoam tape is wound around your head and over your mouth, keeping the sock firmly in place
6) Plastic wrap is wound around your head and very carefully around your neck, leaving your nose and eyes exposed
7) Strips of vinyl tape are placed on your neck, and head, covering them both completely, except for your nose and eyes

You are lowered to the ground, onto your back
I grab a seat by a table a few feet away, and watch you. You are free to lay there and enjoy, or struggle to free yourself. Alternatively, the 3 hour time limit starts at this time, and you can utter the safe word signal at any time should you need out before then.
Are you curious why your feet and eyes are left exposed?