Box springs are a perfect hiding place for bed bug because of their convenience to your mattress. Bed bugs thrive in mattresses and bedding because of the accessibility to your blood, body heat, and carbon dioxide you exhale. Bed bugs feed by sucking blood-preferably human blood. They pierce your skin with two hollow tubes; one injects saliva and the other sucks your blood. Within minutes, they can engorge themselves with blood and reach three times their size. The resulting bite will manifest itself as an open sore, pussy blister, rash or hives and the subsequent itching is incessant. The broken skin and exposed sores can lead to varied levels of infection. Combined with other airborne allergens, bed bugs can trigger an asthma attack. Allergic reactions to the saliva injection can, in extreme cases, result in a multi-system allergic reaction and lead to death. Other psychological effects such as anxiety, stress, and insomnia are also common to bed bug victims. The Encase box spring protector will completely eliminate the passage of bed bugs to and from your box spring serving as a mechanism for both treatment and prevention.Cal King includes: 1 cal king mattress protector (72" x 84"), King includes: 1 king mattress protector (78" x 80"), Queen includes: 1 queen mattress protector (60" x 80"), Full XL includes: 1 full XL mattress protector (54" x 80"), Full includes: 1 full mattress protector (54" x 75", Twin XL includes: 1 twin XL mattress protector (39" x 80"), Twin includes: 1 twin mattress protector (39" x 75").