ChatGPT SearchOct 15, 2026
Yes — you can use a trash compactor bag as a backpack liner, and it can be a great budget option for keeping your gear dry on a hike. The main things to consider are the bag's thickness, durability, and how securely you close it.
For backpacking, a waterproof liner inside your pack is often more reliable than depending on the backpack's water-resistant coating or rain cover alone.
Trash compactor bag vs. purpose-made pack liner
1. Trash compactor bag — best budget option
- Usually thicker and tougher than ordinary kitchen trash bags.
- Inexpensive and easy to replace.
- Works well as a simple, waterproof inner liner.
- Can be bulky, and seams or punctures can still leak.
Tip: Choose a plain, unscented bag with no holes, and test it before a trip.
2. Purpose-made pack liner — best for regular backpacking
