The Pulse EP40 (US Navy)

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.

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.

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

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

Our removable shaped hip belt contours to the shape of your body for great load transfer. Featuring 3 inch (7.5cm) wide wings, the fit is adjusted by pulling the webbing inwards for the perfect fit.

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

This hip belt is removable and interchangeable, replacements can be purchased at any time from our website.

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

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

Sewn using Dyneema stretch fabric.

Sewn-in loop to easily connect an ice axe or walking poles.

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.

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

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.

The Pulse is the same shape as The Atom but additionally uses a lightweight carbon fibre frame, padded backpanel and a hip belt. This means that The Pulse can carry a greater overall load than The Atom (13kg vs 9kg). As standard, all pockets and straps are the same, The Pulse has a logo strip below the front pocket and also a sewn-in ice axe loop.

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.

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 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.

The lead time is the estimated time between placing an order and it leaving our workshop. The lead time for new orders can always be found in the top banner on any page of our website.

If you have already placed an order, you will have received an email with an estimated shipping date, this date is still accurate unless we have emailed you saying otherwise.

Pre-existing orders can ignore any lead time updates to the website, this is relevant for new orders only.

Any unused off-the-shelf backpack or accessory can be returned to us for a refund, minus the shipping cost, up to 14 days after you take delivery of the goods.

Return shipping is at your own expense. If you wish to start a return, you must contact us first.

No, In all of our backpacks the height remains the same regardless of torso size.

So a large torso pack will have the exact same volume as a small torso pack.

Yes! Shipping rates are calculated at checkout based on your delivery information. If you live in a remote location, we may occasionally need to charge a small extra surplus for shipping. This will be calculated when we ship the pack.

Full details on our shipping page.

Atom Packs is registered for VAT in the UK: GB329424790

All prices displayed in GBP (£) on our website will include VAT at 20%. If you are browsing our website from outside of the UK, you may shop in your local currency, in which case the price shown will be exclusive of VAT.

Customers outside the UK are not liable for UK VAT, however, you may be liable for your country’s import duties and tax.

Make sure you understand how much Customs Tax and Import duty you might pay before ordering - check out https://www.simplyduty.com/import-calculator/ for an estimate. This is a guide only.

The HS code for backpacks and accessories is 42022290