To enable the appropriate down bedding to be selected for the relevant season, heat requirements, or temperature in the bedroom, most manufacturers offer at least five different heat levels.
Heat level 1 – extra-light:
for hot summer nights and people who get particularly hot at night
Heat level 2 – light:
for the warm part of the year from spring to fall, with a little extra for slightly cooler nights. Also highly recommended for waterbeds.
Heat level 3 – medium:
the “all-year-round” bedding. A good compromise for those whose bedroom stays a relatively consistent temperature.
Heat level 4 – warm:
cozy during the cold season.
Heat level 5 – extra-warm:
warm winter bedding for those who like to sleep with the window open during the winter, or those who simply feel the cold.