Pack Liner
Overview
A pack liner is a waterproof internal barrier used to protect gear inside a backpack from moisture, typically made from durable plastic or specialized waterproof fabric.
Key points
- Often more reliable than pack covers in sustained rain.
- Protects critical items such as sleep systems and clothing.
- Common DIY options include contractor bags or roll-top dry bags.
- Helps maintain organization and provides redundancy in wet environments.
Details
Pack liners function as the primary moisture barrier inside a backpack. Unlike pack covers, liners shield gear regardless of external water exposure, including river crossings or heavy rain. Options range from simple plastic bags to purpose-built, ultralight waterproof liners. Many hikers divide internal compartments using multiple small dry bags for added protection.
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Illustrative hiking footage
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