Finland is known for its changing seasons and weather conditions that some might even call “challenging”, so being prepared is always a good idea. A waterproof shell jacket should be found in every outdoor enthusiast’s wardrobe, and with the right base and mid layers, a single jacket can serve you all year round.

So, which one should you pick from all the options available?

There’s no single answer that would satisfy everyone’s needs, but these tips will put you on the right track. Be sure to also check out the Luhta Outdoor Store spring 2022 outdoor jacket overview.

1. Determine the level of rain protection you'll need

Many different fabrics are described as waterproof, but water resistance is really more “shades of grey” than “black or white”.

Waterproofness depends on the pressure exerted on the fabric

A light drizzle doesn’t have much pressure behind it, but adding strong winds or a heavy pack on your shoulders will significantly increase the pressure, making it possible for water to penetrate weaker membranes.

The water column rating tells you how much water pressure the fabric can withstand

A 5 000 mm water column rating is enough to stop rain under normal use. If you’re spending longer times in heavy rain, you should opt for at least a 10 000-20 000 mm rating, and for the toughest storms, pick a GORE-TEX fabric with a water column rating of 28 000 mm.

2. Don’t skimp on breathability

When running, hiking, or otherwise getting sweaty, it is important to make sure that the warm, moist air isn’t trapped inside your clothes. This is why breathable waterproof membranes have tiny pores in them, which are too small for water to get in, but big enough for water vapour to make it out.

The higher the breathability rating, the better the moisture can escape your clothes.

5 000 g/m2/24h is enough for basic use, but when moving fast or carrying heavy loads, a breathability rating of at least 10 000-15 000 g/m2/24h is recommended.

3. Keep your ventilation options open

Purpose-built ventilation openings on the back or under the arms are definitely a big plus when you need to get rid of excess heat, but even something as simple as opening any pocket zips can provide some relief. Do note that ventilations on the back are blocked when wearing a backpack, so pit zips can be a better choice for hikers.

4. Consider the layers within the layers

There are many ways to make a waterproof garment. The type of construction affects both the feel and functionality of the item.

2 layers for most users
In a 2-layer construction, the waterproof membrane is bonded to the outer fabric while the lining hangs loosely inside. Two-layer jackets are usually cheaper and lighter than three-layer jackets.

3 layers for heavy use and challenging terrain
In three-layer jackets, the outer fabric, waterproof membrane and lining are all bonded together, which keeps the membrane better protected from wear and tear, increasing durability in tough conditions.

2.5 layers for going ultralight
2.5-layer fabrics replace the lining with a very thin protective print applied directly to the inside of the membrane. These types of clothes are thin, lightweight and highly packable, but the thin fabric usually isn’t as durable as 2- or 3-layer counterparts, meaning you need to be a bit more careful.

5. Focus on the fit

The simplest jackets may just have an elastic band in the hem and cuffs. This is usually just fine, especially in a minimalist backup rain shell, but hook-and-loop adjustments or a drawcord with stoppers can prove useful, since it allows for adjusting airflow versus protection as needed.

Remember to check that the sleeves are long enough when bending your arms or reaching up, and that your arms can move freely. Stretchy fabrics are a big help when it comes to functionality and fit.

Extra tip: Less can be more

Remember that all extra features add to the weight and bulk of your jacket. Consider carefully whether you really need things like snow gaiters, the option to remove the hood, extra adjustments, hand warming pockets and such. Sure, if you’re going mountaineering, these things may be essential, but be realistic – one jacket doesn’t need to do everything, so choose your equipment based on the activities you’ll most likely be doing.