Rather than shrink wrap - use Pacsafe Secure Cable Locks

While shrink-wrapping luggage is common with travel to continents like South America and Africa, it's not a sure fire way to protect your luggage from theft or from tamper. 

PacSafe Secure Cable Lock:

The heavy-duty WrapSafe wraps tightly around luggage making it far superior to common cable locks which only secure handles and straps. Use it on briefcases, suitcases, backpacks, roof-rack luggage, golf bags and bicycles. WrapSafe is light and flexible which makes it very travel friendly. included