Hotcore sleeping bag liners are lightweight and compact, made of a soft, smooth, and breathable polyester. These liners are designed to be placed inside a sleeping bag to add extra warmth and comfort. They also provide a layer of protection, keeping the sleeping bag clean and extending its lifespan. Pongee sleeping bag liners are ideal for camping, backpacking, and traveling as they are easy to pack and clean, and can be used as standalone sleeping bags in warmer weather.
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