An open-ended South America trip sparked detailed packing breakdowns from one-bag travelers. The result: a masterclass in what fits in 26-32L for indefinite travel.
Complete Breakdown
Osprey Daylite 26+6 held: 4 t-shirts/1 tank/1 long-sleeve, 2 shorts, 6 underwear/socks, Patagonia rain jacket, fleece, travel towel. Electronics: 2 iPhones, watch, AirPods, chargers, portable battery. Full toiletries in ultralight containers. Complete first aid kit. Wearing Hoka hiking shoes.
Community Refinements
Backup phone debate: Basic unlocked phone ($40-60) provides emergency function at fraction of second iPhone weight/value.
Climate challenge: South America spans Patagonia cold to Amazon heat. Add lightweight down jacket or swap fleece for Patagonia Nano Puff.
Two Weeks vs Two Months
Consensus: Minimal clothing difference. You wear same rotation regardless. What changes: toiletry quantities (buy locally for long trips), medication supplies, seasonal gear swapping.
The Merino Upgrade
Swap cotton for merino (Icebreaker, Wool & Prince). Resists odor (wear 3-5 days), regulates temperature, dries faster, packs smaller. "Two merino shirts do what six cotton shirts do, at half the weight."
32L vs 40L
"Can you do 32L? Yes. Will you enjoy it more with 40L? Also yes." The (45L) offers crucial breathing room while staying carry-on compliant.
