Forever ends the debate about whether you can afford the extra weight of a pack cover - the medium size weighs only 4 ounces (113g) and packs into a tiny stuff sack.
Even though you may have your gear stored in waterproof bags inside your pack a pack cover will stop the fabric of the rucksack soaking up water and becoming much heavier.
|Pack Cover XXSmall||10-15 Litre/600-900 cu in||46g|
|Pack Cover XSmall||15-30 Litre/900-1800 cu in||56g|
|Pack Cover Small||30-50 Litre/1800-3000 cu in||84g|
|Pack Cover Medium||50-70 Litre/3000-4300 cu in||113g|
|Pack Cover Large||70-90 Litre/4300-5800 cu in||130g|