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The Reactor Lightweight Sleeping Bag Liner transforms your sleep system into a warmer, more efficient setup without the weight penalty. Engineered with Thermolite® Pro fabric featuring infrared-absorbing ceramic pigments and hollow-core fibers, it adds up to 4°C of warmth while staying remarkably compact—perfect for ultralight backpacking and alpine expeditions. Stretch-knit construction and articulated arm openings deliver unrestricted movement, while HeiQ Fresh odor control keeps things fresh between washes. Machine washable and quick-drying, it extends your sleeping bag's life by reducing wash cycles. Maximize warmth, minimize bulk, and travel lighter.
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🇺🇸 Ship from USA · On Agora since 2025
$64.95