How much will you lose in the air?
Cabin humidity sits between 10 and 20 percent. Dry air pulls water out of you at roughly 200ml an hour. This planner tells you how many sachets to pack.
Typical estimate of water lost per hour of flight, driven by very low cabin humidity, pressurised air and limited movement. You lose it without noticing because you never feel sweat.
Cabin humidity is 10 to 20 percent.
A normal indoor humidity sits around 40 to 60 percent. Air at altitude is dryer than most deserts, and it pulls water out of you steadily.
Coffee and alcohol compound it.
Caffeine and alcohol both slightly increase fluid output. Having either on a flight adds to what you are already losing to the dry air.
Heat and activity stack on top.
Land somewhere warm, walk round a city in the sun and the starting deficit becomes a real one. A daily sachet keeps the balance steady.
The 20-pack is the travel size.
Twenty lightweight sachets. Fit inside a wash bag or the front pocket of a carry-on. Liquid rules don't apply because there's no liquid until you mix.
- Under 100ml of volume in total, all in dry powder.
- Six flavours so every day feels different.
- 20 sachets covers most trips with room to share.
- One-time checkout live. Subscription reorders can be wired later.