Sleep 3.0 · Chapter 7 · 1 min read
How it is adjusted
Fine-tuning: usually two zones, two minutes.
After at least four weeks, you tell us what you feel. Usually two zones change by one step. We send the new blocks; you unzip the cover, swap them, and zip it closed. One fine-tuning is included within 90 days, and every zone can be replaced for twenty years.