The Catchmaster Silder Bedbug and Insect Monitors feature a textured base which bedbugs or other insects explore while entering from all four sides. Once they enter, bedbugs are then trapped in the adhesive and can be seen easily through the clear window. The durable plastic is strong enough to be used under mattresses.  These monitors contain no pesticides or chemicals.  Recommended for use in areas such as hotels, apartment complexes, long-term care facilities, hospitals, dormitories, offices, and public storage.  Best used as an early detection device.