The Pulse EP50 (Black)

The Pulse backpack is the ideal choice for lightweight thru hikes and weekend trips.

£260.00
If any sizes are unavailable, our next restock will be on September 30, 2025

10 reviews
Torso Size
Hipbelt Size Guide
Typically ships within 2 weeks

Perfect additions to The Pulse

The Hipbelt Pocket

The Hipbelt Pocket

£22.50
The Roo (Zero Waste)

The Roo (Zero Waste)

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The Roo (Zero Waste)

The Roo (Zero Waste)

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The Roo (Zero Waste)

The Roo (Zero Waste)

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The Roo (Zero Waste)

The Roo (Zero Waste)

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The Thinny - 3mm (1/8 inch) Foam Sleeping Mat

The Thinny - 3mm (1/8 inch) Foam Sleeping Mat

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£10.00
The Thinny - 3mm (1/8 inch) Foam Sleeping Mat

The Thinny - 3mm (1/8 inch) Foam Sleeping Mat

Medium

£20.00
The Thinny - 3mm (1/8 inch) Foam Sleeping Mat

The Thinny - 3mm (1/8 inch) Foam Sleeping Mat

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£25.00
Sticker Pack

Sticker Pack

£4.00
The Roo RE (Black)

The Roo RE (Black)

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The Roo RE (Black)

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The Pulse

Trails are changeable. If you go on a long thru hike then your gear, clothing, food and water requirements will all change as the trail goes on. The Pulse is the answer – an ultralight pack that can adapt with you to meet the conditions.

Built on the same body as the Atom, The Pulse gives you the same easy access to everything you need to keep hiking all day long using the five accessible pockets when worn. We increase the torso length a little to accommodate a removable hip belt, the back panel has a removable carbon hooped frame and foam sleeve inserted from the inside. When all of this is stripped from the pack, the bag is 160g lighter and ready for an even more ultralight adventure.
Features Overview
  • Fixed Shoulder Pockets
  • Adjustable Side Pockets
  • Dyneema Stretch Front Pocket
  • Side Compression with Lineloc
  • Removable 3-inch Padded Hipbelt
  • Single Top Strap
  • Bottom Pocket
  • Fixed Ice Axe Loop
  • Roll Top Closure
  • Whistle Sternum Strap
  • S-Shaped Shoulder Straps
  • Haul Loop
  • Snap Fasteners
  • EPX200 Panels
  • EPX400 Base

Explore Full Features

View details

Find your hip measurement

Take the tape measure and wrap it around your hips bones (or where you wear your hip belt). Where the two ends overlap is your hip measurement, use the chart below to find your size. If you are in between two sizes, going for the smaller of the two will ensure a good fit - trust us on this.

Hipbelt Size Inches Centimetres
Extra Small 28 - 30 71 - 76
Small 30 - 32 76 - 81
Medium 32 - 34 81 - 86
Large 34 - 36 86 - 91
Extra Large 36 - 38 91 - 96
XXL
 38 - 40 96 - 101
XXXL 40 - 42 101 - 107

 

Perfect Hipbelt Fitment

Specifications

Starting weight

675 g

23.8 oz

Load capacity

14 kg

30 lb

  The Pulse 50L
Weight
675.0 g
23.8 oz
Load capacity
13.5 kg
29.8 lb
Height fully unrolled
84.0 cm
33.1 in
Circumference at base
84.0 cm
33.1 in
Circumference at top
94.0 cm
37.0 in
Main body volume
45.0 L
11.9 gal
Side pockets volume
5.0 L
1.3 gal
Front pocket volume
4.0 L
1.1 gal
   
Key features

Fixed Shoulder Pockets

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.

Key features

Adjustable Side Pockets

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.

Key features

Bottom Pocket

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.

Key features

Single Top Strap

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

Fixed Shoulder Pockets

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.

Adjustable Side Pockets

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.

Bottom Pocket

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.

Single Top Strap

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

The Pulse Overview

A quick run through of The Pulse from Atom Packs

The Pulse can help get you to the summit, however your ability to execute a high five is up to you.
2.5L side pockets easily carry two 1L water bottles each side!
Dyneema stretch front pocket keeps your days supplies easily accessible.
The curved Pulse hipbelt is compatible with our hipbelt pockets for extra, at hand storage.
The Pulse

Needs met.

The Pulse. The Pulse backpack is the ideal choice for lightweight thru hikes and weekend trips.

All our bags are designed and tested to meet a specific need. Each item is built by hand to our incredibly high standards right here in our Keswick workshop.

Features

Fixed Shoulder Pockets

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.
Adjustable Side Pockets

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.
Dyneema Stretch Front Pocket

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

These are there to secure a trekking pole or tent poles when stored in the side pocket.
Removable 3-inch Padded Hipbelt

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.
Single Top Strap

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

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.
Fixed Ice Axe Loop

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

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.
Whistle Sternum Strap

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

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.
Haul Loop

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.
Snap Fasteners

These fasteners help secure the roll top and ensure it remains closed while rolling down and compressing.
EPX200 Panels

The main fabric of this pack is sewn using EPX200 fabric.
EPX400 Base

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

The Pulse FAQ

What's the difference between The Atom and The Pulse?

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.

We discuss The Atom & The Pulse in more detail in these videos:

The Atom

The Pulse
Does my torso size affect the volume?

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.
What is a base weight?

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.
Why is base weight important?

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.
What does recomended load capacity mean?

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.
What is a Lead Time?

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.

Shipping

The current lead time for this product is 2 weeks.

How much does UK shipping cost?

For mainland UK and Northern Ireland:

Small Parcel £3.95
Large Parcel £7.95 (for orders over £140)

For Isle of Man and Channel Islands, shipping is calculated at the checkout.
How long does UK shipping take?

Please note: All items purchased from Atom Packs are subject to a lead time, any shipping times quoted start when the order is complete, not from the moment the order is placed. Current lead times can change and are displayed clearly on the site.

Accessories, when completed, are shipped to the UK using Royal Mail 1st Class. This service normally takes 1-2 days.

Backpacks, when completed, are shipped to the UK using DPD next day. This service is normally delivered on the next working day.

Keep an eye out for emails and texts from DPD.
Do you ship to Isle of Man and Channel Islands?

Yes we do!

Customer Reviews

Based on 10 reviews
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100.0
K
Ken M.
Outstanding

I'm extremely happy with this pack. It shipped to the EU in 3 days, I got tons of info and help when ordering it from a really responsive team, the pack itself is super light, of excellent build quality and terrific to wear. Really a very impressive piece of gear!

M
Mark H
Fantastic!

My order arrived in under 24 hours and an exchange within 48 hours. Members of staff are enthusiastic and invested in their products. The packs are top quality and light weight. Great staff, service and great gear, what more could you ask for? I’m chuffed I found Atom Packs.

S
Spicy
Amazing Pack! Even better customer service.

After dealing with a pack that didn't fit for the first half of the PCT, I sent a desperate email to Atom Packs to see if there were any framed pack options in stock, as they were all sold out on the website. To my surprise, Rachel emailed me back within 12 hours, letting me know there were a few packs that were reserved for returns and exchanges. I selected a 50L Pulse and I received it on trail within 2 weeks. As someone who is curvier with a smaller waist and a short torso, I have had so much trouble finding a pack that fits well. The S/XS Pulse fits like a dream, even towards the smaller end of the waist measurements, I have plenty of room in the hip belt to adjust down. The pockets are amazing, I love the bottom on the pack the most for storing my candy salad on trail. I can't wait to have this on a full thru hike (with my new 2.5L Roo) for the CDT in 2026.

J
Jason Newell
Great pack but a bit expensive.

Great lightweight pack that enables me to get out and go further than my old one which was too heavy and uncomfortable for me. Can’t help feeling its a bit over priced though, but I guess if people keep buying them then Atom packs will keep selling them!

M
Martin K.
Go-To Adventure Pack

These packs are just awesome! Soo comfortable and well made, can’t rate them highly enough. For our month long family trip to Everest Base Camp and the Khumbu region in Nepal, I bought four Atom+ 50L packs (now called Pulse EP50) paired with four matching Roo bum bags (large). The staff at Atom Packs were very helpful as we blinged up each of the packs with different coloured shock cords so we knew which pack was whose. We each had plenty of space in our pack for base weight around 8 kg including all gear to 5600m and -20degC, camera gear and 2L of water with filtration gear. Definitely recommend getting a Roo bum bag in a large size instead of the Hipbelt Pocket. I also used the Roo as a bit of a day pack and could fit snacks, camera gear and valuables when we went on side trips, leaving the main pack in the teahouse. The Pulse EP50 & Roo packs were our only luggage which we could take onboard aircraft as hand luggage as we could get them to fit within the maximum size and weight allowances. I can’t wait to use this pack again.

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