Compressport is best known for its compression gear, so when I first got my hands on the Thunderstorm, I was curious to see how the brand’s expertise would translate into a high-performance waterproof running jacket.
Admittedly, I was skeptical. The jacket’s paper-thin material made me question its durability and whether it could really handle harsh conditions. But after months of testing in rainy and windy UK weather, I’m happy to report that the Thunderstorm far exceeded my expectations.
Pros
- Excellent weather protection
- Precise fit is surprisingly unrestrictive
- Unmatched breathability
- Super lightweight
Cons
- Athletic cut won't suit everyone
- Hood and cuffs aren't adjustable
| Unisex sizes | XS–XL |
| Breathability | 75,000g/m² |
| Weight | 126g |
| Waterproofing | 25,000g/m² |
| Construction | 100% nylon |
Design and Features
The Thunderstorm is crafted from Compressport’s so-called “exclusive Japanese fabric,” though it’s essentially 100% nylon, akin to offerings from North Face and Asics. That said, fabric construction is crucial, and Compressport has done a brilliant job. The jacket boasts an impressive 25,000mm hydrostatic head (nearly double that of other jackets like the Harrier Exmoor), meaning it’s superbly waterproof. The fabric also has a breathability rating of 75,000g/m², promising excellent ventilation without the need for additional zips or vents.
Weighing in at just 126g, the jacket feels incredibly light. The minimalist design also stands out—there are no adjustable features like velcro cuffs or drawstring hems, which Compressport has replaced with elasticated bands. The fit is close to the body, with tapered hips, arms, and a snug hood that stays in place in windy conditions. There’s a single chest pocket, perfect for gels but less suitable for heavier items like a phone.
Performance and Comfort
One of the jacket’s standout qualities is its fit. At first, the snug, compression-like feel seemed restrictive, but it quickly proved to be a benefit once on the trail. The slim cut eliminated any flapping in the wind, making it feel like I wasn’t wearing a jacket at all—exactly what you want during a run. The lack of adjustable parts didn’t hinder performance, and the elasticated wrists and hood stayed firmly in place without needing constant readjustments.
In terms of waterproofing, the Thunderstorm excels. Despite its thinness, it kept me dry in downpours, and the DWR treatment ensured rain beaded off the surface. More impressive, though, was the breathability. With no vents to help airflow, the jacket relies entirely on its high breathability rating—and it delivers. Even during more intense runs, I didn’t feel overly hot or sweaty, which is a feat considering the jacket’s tight fit and full zip.
Sustainability
As with many high-performance outdoor products, sustainability isn’t at the forefront of the Thunderstorm Waterproof Jacket’s design. Made entirely from polyamide (nylon), it lacks any significant eco-friendly credentials, such as recycled materials or PFC-free coatings. This is a shame, considering the price point and the increasing demand for sustainable gear. On the plus side, the jacket’s durability means it should last through many seasons, potentially reducing the need for frequent replacements.
Price and Competition
Let’s be frank: the Thunderstorm isn’t cheap. It comes in at a significantly higher price than many comparable jackets, such as The North Face Summit Superior or the Asics Fujitrail, both of which feature similar materials and waterproofing capabilities. However, Compressport’s design and engineering add a unique element. The extreme lightweight build, high-performance waterproofing, and unparalleled breathability push it into the luxury tier of running jackets.
While the Thunderstorm offers fantastic comfort and performance, it won’t be for everyone. The fit, particularly across the chest, is tight—potentially more suited to male runners, and those with wider hips may need to size up.
Verdict
After months of testing, the Compressport Thunderstorm Waterproof Jacket has firmly cemented itself as a top-tier product for serious runners. Its ultralight design, precise fit, and exceptional breathability make it an outstanding choice for anyone seeking a minimalist jacket with maximum performance. Yes, it’s expensive, and its slim fit may not suit everyone, but if you’re after the best of the best in a waterproof running jacket, the Thunderstorm is a solid investment. Just be prepared for a bit of sticker shock!
About the author
Milo Wilson is your tester for the Compressport Thunderstorm. Milo joined the LFTO testing team back in May of 2023 and has since launched a coup to take over the trail running section entirely. So far, it's going okay. He's been reviewing running gear since his days as a freelancer at uni, so he's about as picky as they come. As someone who runs particularly hot, a decent running jacket is hard to pass muster with Milo, so anything above a 3 star rating is probably quite spectacular. You'll find him most weekends (and lunch breaks) thrashing the latest trail running shoes in the Surrey Hills, or hopping a train to the Lakes and taking on some fells!