Waterproof Jacket Buying Guide

Rain or shine, the British outdoors never fails to surprise us. One moment you’re admiring sun-dappled hills, the next you’re scrambling for cover as the skies open up. If you love walking, hiking, or exploring the wild corners of the UK (or beyond), you know that a trustworthy waterproof jacket isn’t just a nice-to-have-it’s essential kit.

But with so many jackets on the market, each promising cutting-edge technology and all-weather protection, how do you know which one is right for you? Should you go for GORE-TEX or try something new like Futurelight or Pertex Shield? What do all those numbers and layers actually mean? And how do you make sure your investment lasts season after season?

When you see a jacket described as “waterproof,” it’s not just marketing speak. The science behind it is called hydrostatic head (HH). This measurement tells you how much water pressure a fabric can withstand before it starts to leak. Imagine a column of water sitting on the fabric-the higher the column (measured in millimetres), the more waterproof the jacket.

• 1,500–5,000mm → Good for light showers and everyday use.
• 10,000–20,000mm → Great for hiking, backpacking, and heavy rain.
• 20,000mm+ → Designed for serious mountain adventures and extreme weather.

Tip → If you’re regularly out in the hills or mountains, aim for at least 10,000mm. For everyday use, you might not need such a high rating.

Staying dry isn’t just about keeping rain out-it’s also about letting sweat escape. If your jacket traps moisture inside, you’ll end up soaked from your own perspiration. That’s where breathability comes in, measured by something called the Moisture Vapour Transmission Rate (MVTR). The higher the MVTR (measured in grams per square metre over 24 hours), the more breathable the jacket.

• <10,000g/m²: Best for low-intensity activities or short walks.
• 10,000–20,000g/m²: Good for hiking, cycling, and general outdoor use.
• 20,000g/m²+: Ideal for high-output activities like running, fast hiking, or mountain sports.

Look for → Underarm zips or “pit zips” for extra ventilation when you’re working hard.

Waterproof jackets use membranes, coatings, and sealed seams to keep out heavy rain.

Water-resistant jackets have a durable water repellent (DWR) finish but won’t stand up to prolonged downpours. They’re fine for light showers but not for serious weather.

Quick check → If you see taped seams and a hydrostatic head rating, it’s waterproof. If not, it’s probably just water-resistant.

Choosing a waterproof jacket isn’t just about staying dry—it’s about matching your gear to your lifestyle. For everyday use, travel, or gentle walks, a 2-layer jacket offers comfort and affordability, though it might feel a bit heavier and less breathable. If speed and packability are top priorities—think fast hiking, running, or lightweight adventures—a 2.5-layer jacket is the agile choice, balancing lightweight performance with a lower price tag, though it can feel clammy and may not last as long. For those facing harsh conditions or demanding mountain environments, a rugged 3-layer jacket stands out with its durability and breathability, even if it comes with a higher price and extra weight.

A 2-layer jacket features a waterproof membrane bonded directly to an outer face fabric, with a loose mesh or fabric lining attached inside the jacket to protect the membrane and add comfort. This design is perfect for everyday use, travel, and gentle walks, making it a favourite for commuters, dog walkers, and anyone needing reliable protection from light rain or urban weather. The main advantages are comfort and affordability, as the inner lining provides a soft feel against the skin and helps with moisture management, while the price point is generally lower than other waterproof options. However, 2-layer jackets tend to be heavier and less breathable than more advanced designs, and are not ideal for high-exertion activities or harsh weather conditions where superior breathability and durability are required.

A 2.5-layer jacket combines an outer face fabric with a waterproof membrane, but instead of a full mesh lining, it uses a thin protective coating or printed layer on the inside to safeguard the membrane from sweat, oils, and abrasion. This makes the jacket exceptionally lightweight and packable, which is why it is best suited for fast hiking, running, and lightweight adventures where minimal weight and maximum mobility are priorities. Trail runners, fastpackers, and cyclists often prefer 2.5-layer jackets for their ease of transport and quick-drying properties. The benefits include being lightweight, highly packable, and often more affordable than 3-layer jackets. On the downside, the thin internal layer can feel clammy or sticky against bare skin during intense activity, and the overall construction is less durable than 3-layer jackets, making them less suitable for rough terrain or heavy use over time.

A 3-layer jacket is constructed with a tough outer shell, a waterproof and breathable membrane in the middle, and a soft inner lining—all bonded together to create a single, highly durable fabric. This advanced design is engineered for mountaineering, winter walking, and any outdoor activity involving prolonged exposure to heavy rain, wind, or snow. Serious hikers, climbers, and outdoor professionals rely on 3-layer jackets for their superior protection and reliability. The main pros are extreme durability, high breathability, and excellent performance in serious weather. The bonded inner lining offers outstanding protection against abrasion and wear, while the advanced construction allows for better moisture management during high-exertion activities. The drawbacks are a higher price point and slightly increased weight compared to lighter options, making 3-layer jackets less practical for casual or everyday use where lighter alternatives are sufficient.