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500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask

500ml Slim Soft Flask

£9.00
£0.00

**These flasks DO NOT fit Harrier Race Vests**  they are for other brand race vests that require slim, tall flasks. Leak proof, smooth BPA free material and easy to use bite valve.

Fast Delivery, No Quibble Returns, Money Back Guarantee 😊

Great Features

Soft Flask Demo

See the soft flasks and their features in more detail on our demo video.

Sturdy pinch weld design, and smooth material makes them quick and easy to remove from pockets. Once liquid is gone, can be squashed down to store or easily refilled.

Made from high quality BPA-free TPU material, no nasty taste 💦

Flexible but sturdy material allows them to stand up and drain easily after washing. The bite valve is also removable for easy cleaning.

Not sure if this is the right size for you? 🤔 Please contact us, we can tell you if this flask will fit your current race vest.

HARRIER CLASSIC 15% OFF

Beginner Bundle

All the essentials, from £95

Our trail Beginner Bundle gives you all the essentials. There is a choice of any race vest, hydration options and key safety items. Pick and mix your favourite colours 😀 If you need some assistance deciding, use the Instant Chat function 💬 and we can help.

Shop Beginner Bundle

HARRIER CLASSIC 15% OFF

Beginner Bundle

All The Essentials, From £95

Our trail Beginner Bundle gives you all the essentials. There is a choice of any race vest, hydration options and key safety items. Pick and mix your favourite colours 😀 If you need some assistance deciding, use the Instant Chat function 💬 and we can help.

Shop Beginner Bundle

Other hydration essentials

500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask
500ml Soft Flask

500ml Soft Flask

£10.00
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask
300ml Soft Flask

300ml Soft Flask

£9.00
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask
500ml Slim Soft Flask

500ml Slim Soft Flask

£9.00
Water Bladder
Water Bladder
Water Bladder
Water Bladder
Water Bladder
Water Bladder
Water Bladder
Water Bladder
Water Bladder
Water Bladder
Water Bladder

Water Bladder

£13.00
Ultra Cup
Ultra Cup
Ultra Cup
Ultra Cup
Ultra Cup
Ultra Cup
Ultra Cup
Ultra Cup
Ultra Cup
Ultra Cup
Ultra Cup
Ultra Cup
Ultra Cup

Ultra Cup

£9.00
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup
Cold Cup

Cold Cup

£6.00
Individual Straws
Individual Straws
Individual Straws
Individual Straws
Individual Straws
Individual Straws
Individual Straws
Individual Straws
Individual Straws
Individual Straws

Individual Straws

£3.00

Not Sure Which To Choose?

Soft Flasks

Choose 500ml or 300ml soft flasks (not slim style) for Harrier race vests 💦

Mix and match colours for water, electrolytes and energy drinks or just to match your favourite outfit 🤩

Water Bladder

Ideal for longer runs or if you prefer weight on your back. 1.5 or 2l options.

Top tip to prevent sloshing. When filled, turn the bladder upside down and suck the air bubble out of the bladder bag. This creates a vacuum.

£3.95 Delivery UK Mainland
FREE Orders Over £99

Allow 2-3 working days
Express £5.95

No Quibble Returns

Simply click HERE

Secure Payments

Choose from PayPal and other trusted payment providers

Independent Gear Reviews

Steve the Beard reviews

Steve the Beard

Ultra Runner and YouTube Gear Tester

Slightly longer and slimmer than leading brand, makes easier to access in the vest. Love the different colours, makes a difference for water and fuel and not getting them mixed up. Slightly thicker material which makes them more resistant to punctures.

When you wash them out and stand them on the draining board they stay upright! Nearly half the price too! Would have preferred measuring scale on the back and the teat is not as good as the leading brand in relation to water flow. But overall, what's not to love for nearly half the price!? Harrier's taken the win for me!

customer image

Liam  Grimley BSc.

Elevate Running

These flasks are the perfect fit for my Agile vest and work with perfection every time. I love that they’re built to last and made by a British company that cares for the environment. Liam at Elevate Running. Photo credit Phil Hill @the_phbalance

Claire Maxted, Wild Ginger Running

"The race vests and Helvellyn poles have won our Best Value Award!"

Loyd Purvis, Run4Adventure

"Wow, I really was impressed with all the kit we tested in the Ultra bundle."

Ronnie Staton, Hobo Pace

"The Kinder 10L felt as good to me as any other vest I've ever worn, but it's by far the best value."

Keri Wallace, Girls on Hills

"The Curbar 5L is excellent value for money - sturdy and practical, and evidently designed by trail runners."

Gary House, RunStrong

"I found the Helvellyn Poles strong, reliable and light. I’d happily recommend them."

Fiona Outdoors

"There is a lot to recommend. I choose the Kinder 10L when heading off for longer trail runs."

Georgia Tindley

"Absolutely loved the Curbar, the fit is great because the XS is actually small!"

Ginger Al

"I see Harrier competing in the big leagues in the future."

Gear Tests

Loved By

Joanna L.

I’ve used Harrier run free approx 4 times now and every time I’ve received great service, I struggled to find what I was looking for this time so used the live chat option and received immediate assistance to help me find what I was looking for.
I’ve purchased the Kinder 10L vest, dry bag and soft flasks, all of which are fantastic! Highly recommend each of these products, define value for money!

Zoe S.

Absolute top quality products, well designed and well made, all for a snip of the price of the "big" names. I have followed Harrier since start up and am so impressed with all the work that has gone into product development, testing and production. I also highly rate Harrier customer service.
I LOVE my Harrier Curbar race vest. It's comfortable, capable and cavernous! One of the best pieces of kit I have bought in a long time.

Anthony D.

Amazing service and an incredibly good price for products that are really high quality and well designed. Can’t wait to put them to full use - I’ve read great reviews of the Helvellyn poles and I’m going to rely on them a lot during several upcoming ultras!!

Oli

The 5L race vest is comfortable and works really well for me - I've had a bit of trouble with other more expensive brands with the packs riding up as I am relatively narrow-chested. It feels pretty robust and has lots of pockets and storage and probably more than I will need. I went for the full works with first aid kit, flasks, survival bag, straws etc etc in an inclusive package and for the first time with this sort of purchase did not feel ripped off and actually enjoy wearing it.
...and I love the packaging...is Harrier becoming the Apple of running gear?(apart from the price obviously!)

Pete W.

Ordered and received my Classic cap and Thorpe Ultra tee today. Very quick and efficient ordering service and delivery. Delivered in a convenient box that works really well. The 2 products are excellent and great quality and lovely to run in. Kate works really hard to ensure quality items are always at hand. Thanks again.

Ben

Fantastic! I had trouble with sizing and the help and advice I received was outstanding, far above and beyond anything I've received from another shop or brand. So if you're having sizing trouble just ask! The vest itself is great too, well made from quality materials and the perfect array of pockets.

Terry

The Kinder vest is a very well thought out piece of kit and excellent value. I bought the beginner bundle and very pleased with it. The vest is very comfortable and well finished, The inclusion of a couple of sterilising tablets for the soft flasks was most welcome to rid the flasks of that plasticky taste. I was impressed by the ability of the flasks to seal and not leak as my previous ones never sealed properly. Delivery was very quick and packaging was kept to a minimum. I'm still trying to figure out how it came so neatly packed!
Please give Harrier a try as their gear appears to be such VFM and support a small Company. WELL DONE HARRIER

Hagrats

I had questions around sizing for the Kinder race vest and they were dealt with quickly and efficiently..... and accurately (it’s a great fit)! The bundle arrived well packaged and quickly and all of the items were exactly as ordered. What’s not to like?! BI will definitely be shopping Harrier again. Thank you

Customer Reviews