If you’ve ever worn your daypack and thought to yourself, “man, I wish this thing could compress to fit on my keychain,” maybe you’d be interested in the new Sea to Summit Ultra-Sil Daypack.

Stephen Regenold of The Gear Junkie got his hands on one and gave it a review, and said while it might not be up to snuff as a technical summit pack, it could be useful on short trips or for packing up dirty clothes at the end of a backpacking trip. I mean, if the thing can fit on a keychain when it’s fully compressed, there’s got to be some use for it, right?

It runs $28, weighs just 2.4 ounces, and has 20 liters of space when fully unfolded. In comparison, the REI Flash 18 I use as a summit pack weighs 10 ounces and holds 18 liters while retailing for about the same price. Huh – maybe the Ultra-Sil is worth a shot!

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by Casey Schreiner

Founder and Editor of Modern Hiker, Author of "Day Hiking Los Angeles." "Discovering Griffith Park," and "Cloud Spotting." Walking Meditator, Native Plant Enthusiast.