Which ultralight backpacking quilt is right for you? Why are sea turtles glowing the dark? Which new mountain bike should you be saving up for? It’s What’s New Outside.

Ultralight Sleep Insulation Guide: Section Hiker has put together a great, interactive guide to quilts, hoodless sleeping bags and such weighing 2lbs or less. It’s the best explanation of the category we’ve seen and will be a great place to start researching a purchase. [Section Hiker]

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Biofluorescent Turtles: NatGeo says bioflourescence is, “the ability to reflect the blue light hitting a surface and re-emit it as a different color. The most common colors are green, red, and orange.” I guess some types of turtles had that super power all along, but scientists are only now discovering it. [National Geographic]

How Bouldering Problems Are Made: Outside has a great feature on the sport of bouldering, it’ll be enlightening whether you’re an experienced climber or a curious maybe first timer. [Outside]

All The New Mountain Bikes From Interbike: Pinkbike has a good roundup of new products from last week’s Interbike show in Vegas. [Pinkbike]

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The North Face Re-Launches Summit Climbing Line: TNF is getting serious about revamping its lifestyle image into something more technical. Halo products like complete re-done “Summit” line for climbers are made for real athletes doing real sports in the outdoors, but will also work for anyone who just wants to move while staying comfortable in cold, wet weather. [Gear Junkie]

What We’re Up To: I’m back in the saddle following a stressful two weeks in Romania and slowly catching up. Expect a bunch of great content this week as I do. I’m also getting ready for an antelope hunting trip this weekend in Wyoming and will be taking the opportunity to test Kuiu’s new “Teton” range of affordable outerwear, as well as a top secret new rifle from Weatherby. Wiley’s seriously bummed that I’ve been traveling without him, so I want to plan an adventure just for he and I in either October or November. Any ideas? Gotta avoid National Parks, they don’t like dogs.

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IndefinitelyWild is a new publication about adventure travel in the outdoors, the vehicles and gear that get us there and the people we meet along the way. Follow us on Facebook, Twitter, and Instagram.

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