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Description
How To: Absurd Scientific Advice for Common Real-World Problems from Randall Munroe of xkcdThe world's most entertaining and useless self help guide, from the brilliant mind behind the wildly popular webcomic xkcd and the million selling What If? and Thing Explainer For any task you might want to do, there's a right way, a wrong way, and a way so monumentally bad that no one would ever try it. How To is a guide to the third kind of approach. It's full of highly impractical advice for everything from landing a plane to digging a hole.
The world's most entertaining and useless self-help guide, from the brilliant mind behind the wildly popular webcomic xkcd and the million-selling What If? and Thing Explainer
For any task you might want to do, there's a right way, a wrong way, and a way so monumentally bad that no one would ever try it. How To is a guide to the third kind of approach. It's full of highly impractical advice for everything from landing a plane to digging a hole.
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4.5 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Great choice
Style: SPF 50 Roll On, Size: 3 Fl Oz (Pack of 1)
After I suffered a second-degree burn from steam, I was told by my doctor that I would have to keep my new fresh skin sun-blocked for up to a year to avoid any scarring or hyper pigmentation. This has been a great selection as it is a roll-on, Which helps a lot with preventing messes that can happen with traditional sunblock bottles. I also like that it is easy to travel with, and the fact that it is zinc based.
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Reviewed in the United States on August 26, 2025
★★★★★ 5
My favorite new mineral sunscreen!
Style: SPF 50 Roll On, Size: 3 Fl Oz (Pack of 1)
This is my favorite new mineral sunscreen! I've been searching for years for a product that is easy to apply, not messy, and doesn't show up too white. This roll-on is the perfect solution. I keep it near the front door and quickly roll the sunscreen on my hands, arms, and chest before leaving the house. The sunscreen applies so quickly and uniformly-- there are no bare spots or messy globs to rub in. Also, the roll-on keeps the sunscreen from oozing out of the tube and getting all over everything. Finally, the roll-on method also eliminates the frustration of having half-filled tubes and pumps where you can't even access the sunscreen when the tube gets low. Here's hoping this doesn't happen with the roll-on. Thank you Sun Bum for creating this wonderful product. I also love the reasonable price.
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Reviewed in the United States on October 24, 2025
★★★★★ 5
great product - it must be blended in well
Style: SPF 50 Roll On, Size: 3 Fl Oz (Pack of 1)
Love this stuff. The roll-on makes it easy to apply on the go. It leaves a white streak unless you blend it in. I don't mind the white streak - at least I know I applied the product.
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Reviewed in the United States on February 4, 2026
★★★★★ 4
Good product, a little pricey though
Style: SPF 50 Roll On, Size: 3 Fl Oz (Pack of 1)
Pretty good consistency and easy to be applied evenly. Much better than the sunscreen products I used before
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Reviewed in the United States on May 29, 2025
★★★★★ 5
Perfect sunscreen
Style: SPF 50 Roll On, Size: 3 Fl Oz (Pack of 1)
I love the roll on sunscreen. It is quicker to apply and my little one can help without squeezing sunscreen everywhere. Will buy again.
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Reviewed in the United States on June 14, 2025