A mosquito looking for blood will be attracted to a person, but will come in contact with the insecticide on the treated net. The mosquito is then killed or repelled by the net. Experiments have found that nets without insecticide can prevent malaria, but are much less effective because the untreated net may be torn or not tucked in properly, or people may roll and sleep against the side of the net where the mosquito can bite. Every 30 Seconds. ITNs are typically conical or rectangular in shape.
Rectangular nets hang from string or frames and are more spacious.
Polyester netting is the most common fabric for nets because it absorbs little water. A sheeting border prevents tearing when the net is tucked under a mat, and at the top of a conical net, sheeting reinforces the weight-bearing apex. Unfortunately, sheeting tends to absorb more liquid than netting. Therefore, when a reinforced net is dipped, a large and usually unknown fraction of the insecticide is absorbed by sheeting tops and borders, where it is presumably much less effective. Durability is an important determinant of net cost, a strong net being a more attractive purchase.