🧸 Full-size 84×33-inch thermal fleece sleeping bag liner with envelope and mummy compatibility. Adds 15°F of warmth to any sleeping bag. Machine washable — extends your bag's cleaning interval from "monthly" to "when needed." Anti-pill fleece resists pilling after 50+ washes. Can function as a standalone sleep layer down to 50°F. Dual purpose: it protects your sleeping bag from body oils (which degrade insulation over time) AND provides a meaningful thermal upgrade. At $30, this extends the range of a $70 bag to a $150 bag's territory. Stuff sack included.
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