Is 100% DEET better than 20-30%?

No. Higher concentrations don't work better, they just last longer. 30% DEET provides 6-8 hours of protection. 100% DEET lasts 10-12 hours but can damage synthetic fabrics and plastics.

Can I buy repellent when I arrive?

Sometimes, but it's risky. Many tropical destinations only sell weak repellents (5-10% DEET) that won't protect you adequately. Always pack your own proven products.

Do natural repellents work?

Citronella, lemongrass, and peppermint oils provide 1-2 hours of protection at best. Fine for short outdoor activities but insufficient for tropical travel where mosquito-borne diseases are a concern.

How often should I reapply DEET?

Every 6-8 hours for 20-30% concentrations, or immediately after swimming or heavy sweating. Apply sunscreen first, then DEET on top after 15 minutes.

How to Pack Effective Mosquito Protection for Tropical Travel

Pack 20-30% DEET repellent, permethrin-treated clothing, and a portable mosquito net. These three items will protect you from 90% of mosquito encounters in tropical destinations. Always pack backup repellent in case you run out.

Choose your primary repellent. Pack a 20-30% DEET spray or lotion. Brands like Off! Deep Woods or Repel work well. Avoid anything under 15% DEET for tropical destinations - it won't last long enough. Pack a 4-6 oz bottle for trips up to 2 weeks.
Pre-treat your clothes. Buy permethrin-treated clothing or treat your own with Sawyer Permethrin spray 24-48 hours before travel. Treat 2-3 long-sleeve shirts, 2 pairs of long pants, and socks. The treatment lasts 6 weeks or 6 washes.
Pack a backup net. Bring a lightweight travel mosquito net even if your accommodation claims to have one. SEA TO SUMMIT Nano nets weigh 1.4 oz and pack tiny. Essential for places like Amazon lodges or beach huts where screens might be torn.
Add evening protection. Pack a small plug-in device like Thermacell for outdoor dining or balcony time. Uses butane cartridges that last 4 hours each. Bring 2-3 cartridges for a 2-week trip.
Include treatment basics. Pack anti-itch cream (hydrocortisone 1%) and basic pain relievers. If traveling to malaria zones, ensure you have your prescribed antimalarial medication and know the symptoms to watch for.

Is 100% DEET better than 20-30%?: No. Higher concentrations don't work better, they just last longer. 30% DEET provides 6-8 hours of protection. 100% DEET lasts 10-12 hours but can damage synthetic fabrics and plastics.
Can I buy repellent when I arrive?: Sometimes, but it's risky. Many tropical destinations only sell weak repellents (5-10% DEET) that won't protect you adequately. Always pack your own proven products.
Do natural repellents work?: Citronella, lemongrass, and peppermint oils provide 1-2 hours of protection at best. Fine for short outdoor activities but insufficient for tropical travel where mosquito-borne diseases are a concern.
How often should I reapply DEET?: Every 6-8 hours for 20-30% concentrations, or immediately after swimming or heavy sweating. Apply sunscreen first, then DEET on top after 15 minutes.