Decathlon Kiprun 900 Rain review: “great value waterproof run layer that strikes a difficult balance”

Decathlon’s Kiprun 900 Rain is a running jacket designed to be both highly waterproof and breathable. As all runners will attest, this is a very difficult balance to strike. But Decathlon has once again proven with the Kiprun that budget doesn’t have to equal basic. 

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Weatherproofing and design

Firstly, the Kiprun’s waterproofing is not to be sniffed at. The 20,000 hydrostatic head (plus taped seams) equates to all-weather use and sure enough, the jacket kept me dry even while running in sustained downpours. The hood, though less impressive, also does the job. Like the other jackets on test, the Kiprun’s hood is not adjustable. It does have side elastication and a high neckline though, which do a good job of keeping it in place. Side to side movement is pretty uninhibited, so it’s easy to spot side traffic or obstacles while running. There’s little in the way of a visor though, so the forehead and eyes don’t get much coverage from the elements. 

Despite the heavy-duty waterproofing, the jacket remains remarkably breathable. The coat’s thin and stretchy 2.5-layer membrane is paired with ventilation channels along the upper back and underarms. These are envelope-style openings that allow airflow out, but no rain in. Thanks to the chest clip, which allows the jacket to…