The Carry-On Only Packing Guide for Any Trip (2-Week Formula)

Checking a bag costs $35–70 per flight, adds 45 minutes to every airport visit, and creates the chance of lost luggage. After traveling carry-on only for 3 years across 30+ countries, I can tell you: you don't need more than a 40L backpack for any trip up to 2 weeks.

Here's the exact system.

The Universal Packing List

Clothing (fits in a single packing cube):

• 5 t-shirts/tops (merino wool or quick-dry — wash 2, wear 2, dry 1)
• 2 pairs pants/shorts (1 for walking, 1 for going out)
• 1 light jacket or hoodie (layers beat heavy coats)
• 7 underwear + 4 pairs socks
• 1 nice outfit for restaurants/nightlife
• Swimwear (doubles as gym shorts)

Shoes (wear the bulkiest, pack the other):

• Walking shoes (worn on the plane)
• Sandals or slip-ons (packed)

Toiletries (3-1-1 compliant):

• Solid shampoo bar (lasts months, no liquid limits)
• Toothbrush + small toothpaste
• Deodorant, sunscreen, moisturizer (all in 100ml containers)
• Razor

Tech:

• Phone + charger + universal adapter
• eSIM (no physical SIM hunting — see our eSIM guide)
• Power bank (under 100Wh for carry-on)
• Earbuds

Documents:

• Passport
• Digital copies of everything (email yourself scans)
• 1 credit card + 1 debit card + $100 USD emergency cash

The Wash-and-Wear System

The secret to carry-on travel isn't packing less — it's washing more. Every 3 days, hand-wash 2 shirts and a pair of underwear in the sink with a dime-sized drop of Dr. Bronner's soap. Wring them in a towel and hang overnight. Dry by morning.

In tropical destinations (Southeast Asia, Caribbean, Central America), clothes dry in 3–4 hours. In cold climates, use a heated towel rack or drape over a radiator.

Merino wool changes everything. It doesn't smell after 3 wears, dries fast, and regulates temperature. One $40 merino t-shirt replaces 3 cotton shirts in your bag.

Destination-Specific Adjustments

Tropical (Thailand, Bali, Colombia, Dominican Republic):

• Drop the jacket, add a rain shell ($50, packs to fist-size)
• Linen or loose cotton instead of jeans
• Extra swimwear

Cold Weather (Europe winter, Japan autumn):

• Wear the puffy jacket on the plane (doesn't count as carry-on)
• Pack thermals (1 top, 1 bottom — worn under regular clothes)
• Swap sandals for lightweight boots

Business/Mixed (city trip + meetings):

• Pack 1 wrinkle-resistant button-down
• Dark jeans that work for both casual and smart-casual
• Collapsible dress shoes exist and weigh nothing

The Bag

Any 40L backpack with a clamshell opening works. The most popular options:

Packing cubes are mandatory. They compress clothes by 30% and keep everything organized. A set of 3 costs $15–25 on Amazon.

What You Don't Need

• A "just in case" outfit (you won't wear it)
• More than 2 pairs of shoes
• Full-size toiletries (buy at destination if needed)
• A laptop (unless you work remotely — your phone does everything else)
• Travel pillow (use a bundled hoodie)
• Guidebooks (your phone has everything)

The Real Benefit

Carry-on only isn't about minimalism — it's about freedom. You skip baggage claim. You walk past the luggage carousel. You can take a spontaneous day trip without worrying about your suitcase. You move faster, cheaper, and lighter.

And when you arrive somewhere new, a Local Friend can meet you right at the metro exit instead of waiting while you drag a suitcase through the terminal.

Browse Local Friends on Roavi and start your next trip lighter.