A shikibuton can be part of a winter sleeping setup, but how warm you are depends on the floor, the room temperature, what is underneath you and the duvet above you, not on the shikibuton alone. On a cold floor, add an insulating layer under HIMARI or SORA, use a warm fitted cover, and choose a heavier kakebuton or duvet on top.
Layering from the floor up
- Floor: on tile, stone or concrete, lay a rug or insulating mat first; on wood, a moisture-absorbing pad.
- Shikibuton: the supportive sleeping layer.
- Fitted cover or sheet: a warmer fabric such as flannel in winter.
- Top layers: a heavier kakebuton or duvet, with a blanket added on the coldest nights.
Heating
Use underfloor heating only when the instructions for the bedding, flooring and heating system allow it. For an electric blanket or heated underlay, follow its manufacturer’s instructions. Turn it off and let the bedding cool and dry before folding the shikibuton. Heated rooms still need regular airing and moisture checks.
HIMARI or SORA in a cold climate
Both models have wool-blend filling: 50% wool in SORA 宙 and 25% wool in HIMARI 日葵. Choose your top quilt, cover and underlay for the room temperature and your own warmth preference.