What Worked

Clothing MVPs: - Linen shirt: "Surprisingly odor resistant" — challenges the assumption that synthetic is always better - Black trail runners: "One shoe for everything" including hiking, gym, city walking, and restaurants - Merino long sleeve shirt: Great layering piece that worked in multiple contexts - 4 underwear, 5 socks: More than typical minimalist recommendations, but "4 pcs. felt right" in high humidity

Gear MVPs: - 6L sling: "Perfect size for actual daily use" with water bottle and rain jacket. Could be out "all day." - DEET 50%: "DEET matters — go strong." Not the place to compromise on mosquito protection. - Earplugs + backup: "Noise is real — earplugs were essential (nightlife everywhere)" - Small towel: Sea to Summit worked for full body drying - No laptop, no iPad: "Didn't miss it" — phone and watch were sufficient

What Didn't Work

Redundancies: - Beanie: Never used in Colombia's climate - Bucket hat: Redundant — should have added neck protection to cap instead - Sun jacket + rain jacket: Should have brought one quality shell instead of two mediocre layers

Oversized items: - Med kit too large: "Imodium Plus → just Imodium next time" - Face cream container: Should have been smaller

The Ciudad Perdida Test

The 4-day trek to Ciudad Perdida (The Lost City) served as the ultimate gear test.

The Nike Gore-Tex trail runners handled everything — hiking, gym, city, and restaurants. The versatility meant carrying only one pair of shoes plus sandals.

Humidity was the killer: "Don't rely on daily washing" when nothing dries overnight. The traveler's 4-piece underwear rotation proved necessary, not excessive.

DEET 50% proved essential. Colombia's jungle isn't the place for weak insect protection or relying on "natural" alternatives.

Future Upgrades

What the traveler would change:

Better shell jacket: Replace sun jacket + rain jacket with one quality all-weather piece

Possibly add ultralight down: Montbell Plasma 1000 Down Jacket for cooler evenings

Better pants: Consider Lululemon or Western Rise, bring just one pair instead of two

Smaller sandals: Xero or Havaianas to save space

Collapsible water bottle: Still considering — hesitant about soft plastics

Fewer shorts: Maybe 2 total instead of 3

The Onebag Advantage in Colombia

Colombia's infrastructure makes light packing especially valuable:

- No waiting at baggage claim in smaller airports - Less stress about lost luggage on domestic flights between cities - More flexibility: Easier to change plans, catch earlier flights - Cheaper flights: Avoiding checked bag fees on budget carriers

The traveler's partner also committed to onebagging (35L carry-on), and both noted the significant reduction in travel friction.

Tech Setup

iPhone 15 Pro Max + Apple Watch Ultra replaced laptop/iPad entirely

10,000 mAh powerbank (Nitecore) for extended days out

Small Joby tripod: "Great for flights + photos"

2 Airtags: One in main bag, one in sling (add hotel keys to sling tag)

2m USB A to C cable: "Often need a long cable to charge and use phone in bed"

The Souvenir Strategy

28L left room for acquisitions: "I had room to bring a 70L coffee sack, and 4 packs of 500g coffee I purchased in a nice Finca in Salento."

This is smart planning — leave space for the things you'll actually want to bring home, rather than filling your bag with "just in case" items you'll never use.

Colombia-Specific Lessons

DEET: 50% minimum. Mosquitoes are serious.

Humidity: Plan for 4+ underwear, not the typical 3. Clothes won't dry overnight.

Noise: Colombia's nightlife is omnipresent. Quality earplugs are essential, not optional.

Laundry: Sink washing every 3-4 days, with acceptance that some items will still be damp.

The 28L Sweet Spot

"28L felt like the sweet spot," the traveler concluded. "Not extreme minimalism — but enough to move freely, stay flexible, and still be comfortable across very different environments."

For travelers heading to Colombia — where you might trek through jungle, explore colonial cities, relax on Caribbean beaches, and attend nice dinners all in the same week — this setup proves you don't need a massive bag. You need smart choices.

The best travel isn't about the destination — it's about what you learn along the way. And what this report teaches is that Colombia's diversity demands versatility, not volume. One good rain shell beats two mediocre layers. One pair of quality trail runners beats separate shoes for every activity. And 28L is enough — if you pack smart.