These mosquito nets are the only EPA registered mosquito nets available in the USA.  They are treated with "Insect Shield" which is a proprietary blend and application process for the insect repellent permethrin.  EPA registration # 82108-1-74843.

The manufacturer claims that: “Insect Shield remains effective through 6 months of constant exposure to weathering or 25 launderings." 

As a supplier of permethrin based repellents, we can vouch for these levels of performance from research conducted for the US Military.  We have seen the reports and have had remarkable results of our own.  The “6 months of constant exposure” statement could be viewed as normal use for 1 to 2 years.  Keep in mind that permethrin deteriorates over time by exposure to UV light, abrasion (washing), and can be completely removed by dry-cleaning due to the dry-cleaning solvents.  We recommend that you store your net when not in use in its carry bag and out of direct sunlight. 

Pre-treated mosquito nets increase mosquito bite protection over non-treated mosquito nets by about 18%.  The use of treated mosquito nets will reduce mosquito populations within the domicile it is used by exposing and thus killing mosquitoes that land on the treated fabric.

You can achieve this same protection level by treating your mosquito nets with permethrin but you will not achieve this level of longevity.  With each net purchased, SCS offers you the option of purchasing at significant discount one application of permethrin for each net purchased.  We strongly suggest that you accept our offer even if you are purchasing a treated mosquito net and use the product on some of your outer clothing.