These tiny hairs with muscles are stored in a "foscicle" upon receiving a (rfid) signal it extends out penetrating the pants and releasing a hook creating a clinging effect.
On the press of a button the tiny hooks at the end of the hair are unlocked and can be retrieved, retracking into the "foscicle" for its next use.
Can be used for a removable pocket without the need to sew velcro on the pants in advance.
Works also for any temporary attachment of materials.-- pashute, Jun 21 2021 What pants?-- pocmloc, Jun 21 2021 Why rfid?-- pertinax, Jun 24 2021 Electricty for change. Don't want to be having to charge the cling constantly.-- wjt, Jul 10 2021 random, halfbakery