Become a Member

Get access to more than 30 brands, premium video, exclusive content, events, mapping, and more.

Already have an account? Sign In

Become a Member

Get access to more than 30 brands, premium video, exclusive content, events, mapping, and more.

Already have an account? Sign In

Brands

Gear

Review: LifeStraw Flex

Get full access to Outside Learn, our online education hub featuring in-depth fitness, nutrition, and adventure courses and more than 2,000 instructional videos when you sign up for Outside+ Sign up for Outside+ today.


None
MSRP: $35

It’s nice to shed weight from a heavy climbing pack by grabbing water on the go. The Flex marries LifeStraw’s light, easily packable water-filtration straw with a collapsible water bottle, a union that’s perfect for both front-country and backcountry climbing. (You can also screw the straw into a hard-plastic bottle, or pair it with a gravity filter or hydration bladder.) You can sip directly from a water source with the straw or fill the bottle and drink from it later at the cliff. I used the Flex in the Flatirons, Colorado, where the fresh, cool water from a snowmelt stream tasted divine both at the source and between burns on my project (from the bottle). But the best part was knowing the water was so safe to drink: The LifeStraw filters away nearly 100 percent of protozoa and bacteria, as well as heavy metals, organic chemicals, and microplastics, with no funky chemical aftertaste. 

Available at:

Disclosure: When you buy products through links on our site, we may earn an affiliate commission.