Ruffwear Swamp Cooler Core

by Ruffwear
Starting From: $31.99 Our Price: $31.99
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  • Add on cooling attachment to specific Ruffwear harnesses and backpacks
  • Uses a three-layer design 
  • Dunk in cold water, wring out and attach to help pull heat from your dog
  • Supports dogs when lifted by the handle of the harness
  • Prevents abrasion to chest and belly area 
  • Easy to attach and remove - velcro hook and loop system
  • Available in a variety of sizes

The Ruffwear Swamp Cooler Core is an add-on attachment that attaches to Ruffwear's Web Master Harness, Approach Pack, Palisades Pack and Singletrack Pack to offer support and protection during backpacking, hiking, or any other outdoor activities in the hot summer heat. This chest guard uses a three-layer design made with a combination of polyester air mesh, dry-weave polyester mesh and polyester. Once the Swamp Cooler Core has been dunked in water, wrung out and attached, the inner core will absorb the water and the inner layer will draw the heat from your dog's chest and transfer the cooling effect while the outer layer will assist in evaporation. This guard also helps prevent abrasion to the chest and belly area while also distributing weight and tension when wearing a backpack or if you ever need to lift or assist your adventure buddy through tough terrain. 

Easy to attach and remove, the Swamp Cooler Core uses a velcro hook and loop system to secure itself onto harnesses or backpacks. Available in a variety of sizes; Please see the specifications tab for more information. 

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Size Guide

Size Chest Girth
X-Small 43.0 - 56.0 cm | 17 - 22 in
Small 56.0 - 69.0 cm | 22 - 27 in
Medium 69.0 - 81.0 cm | 27 - 32 in
Large - X-Large 81.0 - 107.0 cm | 32 - 42 in

How to Measure Your Dog



  1. Neck: Measure the circumference of the base, leaving enough space to fit two fingers comfortably.
  2. Lower Neck: Measure the circumference of the area above the shoulder blades towards the top of the chest, leaving enough space to fit two fingers comfortably.
  3. Chest Girth: Measure the circumference of the widest part of the chest behind the front legs.
  4. Length: Measure the length of your dog's back from the top of their shoulders to the base of their tail.
  5. Height: Measure the distance from the floor to the top of your dog's shoulder blades. Your dog needs to be standing on all four legs.
  6. Paw Width: Measure the widest part of the paw. You'll get a better measurement if your pup is standing.
  7. Paw Length: Measure the distance between the "heel" and the longest toe nail. You'll get a better measurement if your pup is standing.
  8. Muzzle Length: Measure the nose length from the tip to the crook where you want the muzzle to sit comfortably below the eyes.
  9. Muzzle Width: Measure the muzzle's circumference at the widest part, leaving space for two fingers to ensure a comfortable fit.
  10. Weight: Step on a scale while holding the dog, then subtract your weight from the total. A dog scale is conveniently located at all our locations.

Get more tips for finding the perfect fit for your dog's adventure gear in How to Measure Your Dog.


Please secure all fasteners and handwash using a mild detergent in cold water. Please hang to dry and do not dry clean or use bleach on the product.