Ireland does not do half-measures when it comes to weather. From the Wicklow Way in a November squall to the Comeraghs in driving Atlantic rain, your outer layer needs to work as hard as you do. The difference between a jacket that holds up and one that lets you down comes down to two measurable standards: waterproof rating and breathability. The Trailpeak Waterproof Jacket is built around 10,000mm Ventron waterproof technology, which is where this guide starts.
Our pick
Take on wet, windy conditions with confidence in the Trailpeak Men’s Waterproof Jacket, built for reliable protection across everyday use, hiking, and unpredictable Irish weather. Featuring 10,000mm Ventron™ waterproof technology, this jacket delivers strong waterproof performance while remaining breathable, so you stay dry without overheating on the move.
Fully waterproof, windproof, and finished with sealed seams and a sealed front zip, it blocks out rain where it matters most. Underarm ventilation zips increase airflow during higher effort, making it ideal for active days outdoors. An adjustable hem with toggle lets you lock in the fit and keep the elements out.
Made using GRS certified recycled fabric, this jacket combines performance with a more responsible material choice. Durable polyester construction ensures long-lasting wear, while branded zips, an embroidered logo, and an internal hanging loop add practical, premium finishing touches.
A dependable waterproof layer for hiking, commuting, and everyday outdoor use.
What is a waterproof rating?
A waterproof rating measures how well a fabric resists water pushing through it, expressed in millimetres. It is the height of a column of water the material can hold back before moisture is forced through. A 10,000mm rating, like the Ventron membrane in the Trailpeak, withstands ten metres of water-column pressure before the barrier is breached. It is a laboratory-measured figure rather than a marketing phrase, and for anyone spending real time outdoors in Ireland it is one of the most useful numbers on a jacket. It tells you whether the gear is built for a brief shower or a full day of exposure on an open ridge.
How waterproof performance is tested
Ratings come from the hydrostatic head test: a fabric sample is clamped beneath a sealed column of water that is increased until water penetrates, and that height in millimetres becomes the rating. Because the test measures fabric in isolation, real-world performance also depends on how the seams and zips are constructed. The Trailpeak pairs its 10,000mm Ventron membrane with sealed seams and a sealed front zip, closing off the stitching and openings where most waterproof failures actually happen.
The waterproof rating scale
| Rating (mm) | Protection level | Best suited for |
|---|---|---|
| 0 to 5,000 | Basic | Light drizzle, dry conditions, packable shells |
| 6,000 to 9,000 | Moderate | Casual use and short walks |
| 10,000 to 15,000 | Performance | Trail use, hillwalking and sustained rainfall |
| 16,000 to 20,000 | High performance | Mountaineering and winter conditions |
| 20,000+ | Expedition grade | Extreme, prolonged exposure |
At 10,000mm, the Trailpeak sits firmly in the performance band, which is the sweet spot for trail use and hillwalking through typical Irish conditions.
Do not forget breathability
Waterproofing keeps rain out, but breathability lets sweat vapour escape so you do not end up damp from the inside on a hard climb. The Trailpeak adds underarm ventilation zips for airflow on higher-effort days and an adjustable hem to lock in the fit, and it is made using GRS certified recycled fabric for a more responsible material choice.
Choosing your layer
If you mostly need wind protection and shower resistance, a lighter windbreaker may be enough. For full days in the rain, a rated waterproof like the Trailpeak is the safer call, and keeping its coating topped up with our reproofing guide keeps it performing. Compare the full waterproof jackets range to find your fit. Order online for delivery across Ireland: Order online for free Click & Collect, or free home delivery over €100 across Republic of Ireland and Northern Ireland, usually 1 to 2 working days with DPD.
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Frequently asked questions
What does a 10,000mm waterproof rating mean?
It means the fabric can hold back a ten-metre column of water before it penetrates. At 10,000mm a jacket handles trail use, hillwalking and sustained rain.
What waterproof rating do I need for hiking in Ireland?
For full days on the hills in Irish rain, look for 10,000mm or higher, paired with sealed seams. Lower ratings suit short walks and dry, showery days.
Is the Trailpeak Waterproof Jacket fully waterproof?
Yes. It uses a 10,000mm Ventron membrane with sealed seams and a sealed front zip, and adds underarm vents for breathability on active days.
Does a high waterproof rating mean a jacket is not breathable?
No. Waterproofing and breathability are measured separately. A good jacket combines a high rating with venting and a breathable membrane so sweat can escape.
Can I order online for delivery in Ireland?
Yes. You can order online for delivery across Ireland, or shop in person at any of our stores.
Can I collect orders in store?
Yes, choose Click & Collect at checkout. Orders are usually ready within 24 hours and you will get an email when ready. Available from our Dublin Carrickmines, Dublin Blanchardstown and Cork City Centre stores.
Do you offer free delivery on orders?
Yes, we offer free standard delivery on all orders over €100.
Where are your stores located?
We have four stores across Ireland: Dublin Carrickmines, Dublin Blanchardstown, Cork City Centre and Arnotts Dublin.