The 38 Special filters are produced with granulated virgin activated carbon, just like the Can Original, with the difference that within the 38 Special filters there is less carbon, in order to be more economical.
The efficiency in purifying the air remains the same, while the useful life of a 38 Special is 18 months.
The filter shirt is of high quality as well, avoiding the blocking of the micro pores in the case of a very dusty environment.
If the filters are used in suitable conditions-60 to 75% humidity and 80║ of temperature, the life of a 38 Special filter will be at least 18 months.