The Atom RE40 (Black)

Our Forward-facing, deep and low side pocket design keeps your bottles secure while still being low enough to reach into whilst the pack is worn. Each pocket can keep 2 x 1L Smartwater style bottles secure, just tighten the elastic using the pull adjuster.

Each pocket features two drain holes to stop rain collecting in them.

Easy-access bottom pocket featuring a large opening on the wearer's right and trash port on the wearers left.

Sewn using Dyneema stretch fabric.

Made with Dyneema stretch fabric. Can hold 5L, not included in the total volume.

Each pocket is super stretchy and big enough to hold most smartphones, a day’s worth of snacks or a 700ml water bottle. The elastic is fixed and, owing to its clever design, does not need a tensioner.

Made with two simple elastic loops with toggle adjusters, these allow you to connect an ice axe or trekking poles to your pack.

Elasticated, removable and height adjustable, on a long thru hike we recommend keeping it with the whistle facing down to prevent it getting blocked.

A simple adjustable webbing loop to help close the pack or secure a large light item like a roll mat.

Removable and designed to be able to store a folded Z-rest or assist with air drying your clothes.

The closure has a 15mm vertical side compression. The roll top can also be clipped together at the top (dry bag style) and the side compression clipped around the front of the bag to aid carrying snowshoes or maybe a huge packs of chips etc.

Our S-shaped straps are designed to perfectly hug the contours of your body.

Sewn using 11mm foam, durable 210d Robic Extreema face fabric and breathable and soft 3mm thick spacer mesh.

This simple webbing loop is there so you can pick up and set down your pack without putting excess strain on the shoulder straps. Using this will extend the life of your backpack and keep your shoulder straps in good condition.

These fasteners help secure the roll top and ensure it remains closed while rolling down and compressing.

The main fabric of this pack is sewn using EPX200 fabric.

The bases of all of our packs are sewn using this highly durable 400 Denier fabric in Black.

These are there to secure a trekking pole or tent poles when stored in the side pocket.

This is our best guess at what the average person could load into this pack while still being comfortable.

This is entirely dependant on your physiology so must be taken with a pinch of salt. i.e. If you are Chris Hemsworth (Thor... Phwoar!), you may well be able to carry more weight than, say, Gollum from the Lord of the Rings.

In general, we find our limits to be fairly accurate, however, If you find yourself nearing or exceeding the number listed with any regularity, then you should probably look at a more supportive pack from our range.

Your base weight is the total weight of all clothing and equipment that will be in your backpack while hiking. You should not include consumables like water, food, medicine or fuel.

i.e. the weight of an empty fuel canister can be considered for your base weight, but the fuel within it cannot.

This is a somewhat philosophical question, as, base weight has more significance the longer you are planning to hike.

In general, base weight gives you an indication of your level of packing discipline. (Remember, base weight is the total weight of everything non consumable that you will be carrying) There is no one correct base weight for each backpack, provided you are able to add enough food and water to remain under our recommended load capacity for your chosen backpack.

i.e. on a 4 day trip, along with your base weight, you would have to add 4 days of food (let's assume 1kg of food per day), to keep pack weight under 8kg total, you would need a base weight of sub 4 kg where as the same hiker on a 2 day trip could afford a 6kg base weight to remain under the 8kg total.

This Atom comes with a fairly fixed spec, however if you wanted to change the elastics then that is a quick way to update or refresh the look of your pack.

(we do not recommend you replace the side pocket elastic unless it breaks as, it is tricky to do)

Atom Packs is a small team, we quote a 2 week lead time even on in stock items to allow us to make any hip belts or accessories that go with your order, this also allows us to adapt to fluctuating demand.

In general, we aim to ship out far sooner. If you want to know before ordering when your item will ship, please contact us.

Yes, even though our materials are water resistant, the seams are not taped and thus water may ingress into the pack during extended rain.

Any items that you wish to keep dry must be kept in a waterproof stuff sack or liner.

No. The Atom is designed without this - this means you must be considerate when you pack it to make sure the back panel is free from lumps or pointy items. Check out Dexter's packing Video for tips!

Yes, this is possible from our accessories. Adding a hip belt will increase the load carrying capacity of The Atom.

If you are buying the pack with the intention of always using the hip belt, we recommend that you go for the torso size above yours (i.e. if you measure a Small you should purchase a Medium) this will ensure the straps fit you correctly.

If you are asking this question, the likely answer is no. This pack is designed for the dedicated ultralighters only and will probably punish those who overpack it.

No, ready made packs are sold only as pictured, this enables us to hold them in stock and, thus, get them to you faster.

However, If you wish to customise an Atom, you can go to our customiser and build one your way!

Our packs are not waterproof.

We use highly waterproof fabrics but we do not tape the seams. Therefore some water may ingress into the pack during periods of extended rain.