33 Genius REI Products You’ll Probably Wish You’d Discovered Years Ago

1. A four-function whistle that's a compass, magnifying glass, thermometer, and, of course, emergency whistle all in one handy-dandy little tool. Perfect to clip onto your pack just in case.

Promising review: "Good multitool I like to have on my daypack. Clipped onto my sternum strap for easy access. Very lightweight." —Luis M

Price: $6.50

Continue reading to learn moure about genius REI products, written by Rachel Dunkel.

DÈNYE MIZAJOU

June 26, 2025

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Rachel Dunkel

Freeland Writer

Rachel Dunkel is a freelance writer and editor based in Los Angeles. Get in touch with her at racheldunkel.freelance@gmail.com.

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Medya Mansyone

Sawyer’s spray offers an impressive 12 hours of protection against mosquitoes and ticks, and a little less (eight hours) against flies, gnats, and chiggers.

Korin Miller
Health, Lifestyle and Commerce Writer

Medya Mansyone

Sawyer’s Permethrin spray has also worked as promised.

Mark Melotik
Freelance Writer

Medya Mansyone

Sawyer, for example, checks to ensure that no pore size exceeds 0.01 microns, stating that “the filters are then checked four more times at crucial points of assembly for filter integrity before they make their way onto the shelf.”

Dan Hu
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