What Our Gearhead® Experts Are Saying:"I used the small and XS sizes on a weeklong trip and they made a big difference. Everything had a place, and they barely added any weight to my pack. I ended up keeping one packed in my bag the whole time."We pack with intention when every ounce and every inch matters, and the Ultralight Packing Cube from Peak Design helps us stay organized without adding bulk. Whether we’re dialing in a carry-on or building out a multi-day travel kit, these cubes keep smaller items contained and easy to access so we spend less time digging and more time moving. Built from ultralight Terra Shell™ 50D fabric, each cube balances durability with minimal weight, making them ideal for travel where efficiency is key. The streamlined single-compartment design keeps things simple, while weatherproof construction and UltraZip™ closures help protect contents from the elements. XXS, XS, and Small sizes allow us to organize everything from cords and essentials to clothing and shoes, and when not in use, they fold flat or roll up to disappear inside any bag.