Frameless, hipbeltless construction enables unrestricted movement for ultralight hikers
Lightweight build reduces fatigue during long treks
External side pockets provide organized storage for essentials
Stretchable front pocket accommodates additional gear as needed
Durable nylon shell offers reliable protection on rugged terrain
Summarized by Shop
On the trail, it's not just about what you pack—it's about what you choose to leave behind. Meet The Atom, a thoughtfully crafted pack for the ultralight hiker.
The Atom embodies the essence of less—hipbeltless, frameless, effortless. Tailored for those craving to go further, faster, it's your go-to for FKTs and ultralight thru-hikes. No
Load Capacity
9 kg (20 lbs)
Maximum Pack Weight
416 g (15 oz) / 428 g (15 oz) / 453 g (16 oz) depending on model
Main Body Volume
25 L / 35 L (model dependent)
Side Pockets Volume
2 x 2.5 L
Front Pocket
Stretchable, up to 5 L additional capacity
Height (fully unrolled)
68 cm / 77.5 cm (model dependent)
Circumference at Base
76 cm / 79 cm (model dependent)
Circumference at Top
84 cm / 86 cm (model dependent)
Summarized by Shop
5.0
13 ratings
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Atom RE 40
Having used the Atom RE 40 for a few overnight camps and one long distance trail I am very pleased with it's performance. It carrys 6kg comfortably with no problems and provides amble storage for a full lightweight camping setup inc food for a few days. I love the accessability of the side pockets while still wearing the pack and the extra capacity of the front stretch pocket is ideal for waterproofs. I purchased the webbing hip belt as well but some reviews had stated that the retaining clips keep coming undone during use. I secured the clips closed with a couple of small cable ties and had no issues over a full week of walking.
Overall, a great piece of kit which is well made, practical and very light. Hopefully my Atom will be with me for many years to come.
G
Greg · June 2, 2026
One year in and still loving it.
S
Seb · April 9, 2026
Love this pack
Bought the Atom 40 last year and used it for 7 days on the swcp and all the Cotswold way.
I added the hip belt from the start and had no problem carrying my tent ( xmid pro 2) sleep pad (xtherm loft large) quilt, clothes, toiletries, snacks and water, I don’t carry a cook system as I eat cereal bars, fruit nuts etc which I carry. Definitely could fit a gas canister and small burner if I wanted to.
I found the pack comfortable and extremely enjoyable to use, who doesn’t love a secret pocket at the bottom of their pack!
If I wanted a larger pack I would buy the pulse 50 but the temptation then is to carry more gear which defeats the object, maybe if I’m going for longer than 7 days.
Highly recommend.
