>>2344495Get a garbage bag the size of your pack, so if it's a 50 liter get one of those, and use it to line the inside of your pack. Essentially just put the bag full of stuff into your pack, once everything is in pull the draw strings closed, and most the time I have another sack of stuff put ontop upside down. This has saved me countless times either because I slipped in a stream and dunked my pack for a second, random bullshit rainstorm etc. Hardly adds any weight.
Pic related, to give you an idea.