Inexpensive: At the thrift store/garage sale get men's leather belts. Punch or drill new holes to fit the wrist and ankle sizes. Get a "DEE" ring at the hardware store. Punch or drill holes to fit in the belt. Split the dee ring, force through the holes and twist back. Now get some lamp hanging chain, snap clips and you're in business.
Old nursing texts recommended roller gauze (kerlix) for mild restraint in surgery or the ICU of a confused patient. This from Charly D Miller on the web
THE "FULL KNOT" METHOD OF LIMB RESTRAINT:
Take a doubled length of roller gauze and place it around the patient's wrist, with the wrist at the center of the roller gauze length.
Tie a half-knot, tightening the restraint until it cannot be slid off the patient's wrist, but does not occlude distal circulation.
Finish the knot by tying another half-knot once the appropriate size is reached - this is a "full" knot.
Anchor the full-knotted-restraint at the same T-junction that any other restraint is anchored. (If replacing a slip-knot, be careful to tie this new restraint above or below the slip-knot. If tied on top of the slip-knot, when the old restraint is severed, the full-knot's material will become loose, also loosening the new anchor.)
Check for circulation impairment.
THE "LOCKED" CLOVE HITCH RESTRAINT:
Using a doubled length of strong roller gauze, assemble a clove hitch. (If you don't know how to do one, find a Boy or Girl Scout and ask them to instruct you!)
Slide the clove hitch onto the patient's limb and snug it down so that it is tight enough to prevent sliding off of the patient's hand, but not tight enough to impair distal circulation.
Tie a "half knot" on top of the snugged clove hitch. This will "lock" the clove hitch so that it will not become tighter - in spite of patient struggles to defeat or escape from such a "soft safety bracelet."
Anchor the locked clove hitch restraint at the same T-junction that any other restraint is anchored. (If replacing a slip-knot, be careful to tie this new restraint above or below the slip-knot. If tied on top of the slip-knot, when the old restraint is severed, the full-knot's material will become loose, also loosening the new anchor.)
Check distal circulation.