3M UltraThon Insect Repellent - 34.34 DEET

Because it is so long lasting, a lower concentration of DEET is effective in this product. (Most insect repellents need to start out at a high concentration of DEET as it "decays" very quickly). The lower concentration is more skin friendly, and it lasts and lasts so you don't have to reapply it often. I have used this all through Southeast Asia. One time, I was swarmed on by a cloud of mosquitoes for 20 minutes- no bites!!

I'm surprised to see the bad reviews. No product is 100% effective, but my colleagues and I use this product in tropical disease "hot zones" in the Caribbean and Western Africa and have had no mosquito problems. Dressing properly matters too, but I personally don't know anyone who disavows this product.

This is the only stuff I'll use! That said, it is expensive, so the rest of my body is covered in long sleeves and long pants. (I just use two dots to cover my face, neck, and hands.) I've used this working in the tropics of Costa Rica, swamps of SW Florida, tundra of Alaska, wetlands of South Carolina, and all throughout Argentina. It holds up! (Only downside is that I always feel a little icky eating with deet on my hands.)

I bought this to use in rural Haiti because it was the number one recommendation of the Department of Health. It was my hope that this would help curb the appetite of the malaria-carrying mosquitos common there. While I slathered up with this lotion, my colleagues all sprayed OFF! on. At the end of the day, I was the one itching welt-sized mosquito bites, while they had hardly been touched (although one of them already had malaria and therefore wouldn't have a big reaction to the bites). Luckily, the anti-malarial drugs I was on were effective.

I have now used Ultrathon in Belize, China, Costa Rica, Kenya and Tanzania. I won't use anything else, others in my groups used other products and got bit

I went through a whole bottle in 3 days in the Uintas of Utah and it seemed like I had to apply it more than I should. I think the REI jungle juice is more effective especially for the price.