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Description & Size guide

When the sun comes out we naturally want to be outside with our dogs. It is highly important to remember though, that dogs cannot sweat to cool as we do. Their lack of ability to cool down leaves the dog highly susceptible to heat stroke. This vulnerability in hot weather is exactly why we believe the Ruffwear Swamp Cooler is necessary canine equipment for every active dog.

By dipping the swamp cooling vest in cold water, ringing it out and attaching it to your dog you will be helping him to keep cool throughout your hike. Designed to utilize evaporative cooling the Swamp Cooler will keep your dog comfortable and work against overheating as you explore.

Read more about: Do dog cooling products actually work?

The Swamp cooler is also good to use on dogs that are becoming overheated because it naturally introduces a cooling system which performs better than wet towels and is far better for the dog than complete immersion as an overheating dog immersed in water can suffer from shock. Therefore the Cooler is a great part of every canine first aid kit.


  • Cools through evaporation
  • Reflects heat away from the dog
  • Inner layer transfers cooling effect directly to the dog
  • Stores water in a specially designed middle layer to maintain consistent cooling
  • Reflective and with a useful ‘beacon’ loop for low light conditions
  • Easy fitting and removing with side release buckles
  • Designed to be easy-wearing and fit perfectly on even the most active dog

When choosing between sizes take the bigger Ruffwear Swamp Cooler for more coverage. 




How To Measure:

Measure your dog's girth, around the widest part of the rib cage.

See Videos for more info.

SIZEDog's Chest (Girth)
XX-Small 33-43cm (13-17")
X-Small 43-56cm (17-22")
Small 56-69cm (22-27")
Medium 69-81cm (27-32")
Large 81-91cm (32-36")
X-Large 91-107cm (36-42")
Delivery & Returns


FREE STANDARD DELIVERY on orders over £49

Delivery is free via Royal Mail Tracked service and will take 3-5 working days* to arrive with you.

BASIC DELIVERY on orders under £25

Delivery is £3.35 via Royal Mail 48 service and will take 3-7 working days* to arrive with you.

STANDARD DELIVERY on orders up to £48.99

Delivery is £4.20 via Royal Mail Tracked 48 service and will take 3-5 working days* to arrive with you.


Delivery is £6.30 via Royal Mail Tracked 24 service and will take 1-3 working days* to arrive with you.

SPECIAL DELIVERY (Guaranteed Next Working Day)

Delivery is £8.99 via Royal Mail Special Delivery. This is a guaranteed next working day service and orders must be placed before 3pm. orders placed on a Friday will be delivered the following Monday. Orders placed after 3pm on Friday will be delivered the following Tuesday. This service may not be available in all location i.e. BFPO or Highlands & Islands.

*Delivery times are estimated from shipment and subject to stock availability. Our cut off time for orders is 3pm. Working Days are Monday to Friday and don't include UK public holidays.


At we operate a fair postage policy and we have no additional charges for deliveries to BFPO addresses or the Highlands & Islands.


Delivery to EU from £10.99 (Royal Mail Tracked And/Or Signed)
Free Delivery to EU on orders over £150

International Delivery (Outside EU):
International Delivery £11.99 (Royal Mail Tracked And/Or Signed)
Free International Delivery on orders over £200


We operate a 60 day returns policy at K9active. Items can be returned within 60 days of the shipment date.

For orders placed in the UK we provide free returns potage for exchange items. UK Only orders requesting a refund you can use our returns label, the cost of which £3.50 (Royal Mail Tracked return service) will be deducted from your refund. Alternatively you can use a courier of your choice.


Delivery for some products mainly Large items and Dog Beds will incur shipping charges in addition to our regular postage rates above. In most cases these products will be sent directly from the manufacturers warehouse on a next day courier. In all cases that there will be additional costs for a product to be shipped you will be advised on the product page and you can see the exact cost for your order in the cart using the shipping estimator.

For information about returns, please click here to view our Returns Policy.

Swamp Cooler Dog Jacket by Ruffwear

Size Guide