METHOD OF ENSURING USER COMFORTABLE SLEEP AND METHOD OF DETERMINING PARAMETERS OF EIDER-DOWN FOR USER COMFORTABLE SLEEP Russian patent published in 2008 - IPC A47G9/02 

FIELD: personal effects and household articles.

SUBSTANCE: method of ensuring user comfortable sleep lies in the following: by user heat exchange heat resistance of eider-down with filler is determined and eider-down is chosen by heat resistance of its multi-layer structure on condition of equality of user heat exchange and eider-down heat resistance. In determining total heat exchange Qt of total body surface of user, heat exchange of total area St of person body surface, separately for male and female taking into consideration their height, weight and age, is taken into account; total heat resistance of eider-down with filler is determined by formula, according to which eider-down with filler is chosen, minus additional sources of heat resistance.

EFFECT: increase of comfortability and convenience of using due to ensuring of stable thermal regime in undercover space.

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