Sorry to upset, disappoint, and terrify you, but these lil things are NOT going to protect you from bedbugs. Bedbugs live in mattresses and pillows, they have no trouble at all making their creepy little way around the mattress pad, fitted sheet, pillowcases, and assorted bedding. What's one more sheet to them? These are, however, EXCELLENT little devices for taking bedbugs HOME with you. Unlike a normal blanket or sheet, which can be shaken and spread out, the closed, sock-like container of this item is difficult to inspect for bedbug poo.
That isnt to say you shouldnt get one. If you question the cleanliness of a hotel's sheets, if you get stuck out on the couch, if you're sick off your spouse putting his or her icy feet on your legs, by all means, these are great for that. But bedbugs- not so much. To avoid bedbugs, LOOK for bedbugs. Pull your bed at the hotel apart, check the sides of your mattress- especially along the seams- for black-brownish flecks. This is bedbug poo. And if you find it- move at least 2 rooms away on either side and check again.