This 260 coil innerspring organic crib mattress is the best in the market. PureRest used to carry other mattresses but found that lower than 260 coils and/or the organic cotton not being tufted caused too many returns from body impressions and softness complaints. Therefore PureRest made this organic crib mattress with 260 coils of U.S. steel and uses a fully quilted organic cotton batting layer for total stability over 10-20 years of use. PureRest then covers all this with their organically grown wool which is organically processed and certified by Oregon Tilth. This is quilted between 2 layers of organic cotton for more breathability. No chemical treatments in any of the processes.