キャンプマットのR値とは?初心者が知っておくべき基本と選び方

用語集・基礎リファレンス
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A tent floor typically needs about 2 – 3 inches of closed‑cell foam insulation, which is roughly 5 – 7.5 cm.
If you’re bracing for colder, harsher winter nights, you might go up to 3 – 4 inches (≈ 7.5 – 10 cm) for a higher R‑value (≈ 4 – 6) and more protection against bottom chill.

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