Your waterproof trousers should have a side zip from the ankle up to and ideally over the knee to allow you to slip them on without having to take off your boots first.  Bear in mind zips are never in and of themselves truly waterproof so look out for a fabric flap to keep you completely dry.

If you are buying your waterproof trousers for cycling or running you may choose a pair with an elasticated cuff, but this isn’t a good idea for walking because it drives the raindrops down into your boots ending up in squidgy socks. Look for a pair which sit over the top of your boots so the water simply rolls off them and down the outside of your boots.

It can be worth buying a pair of trousers slightly bigger than you usually wear. Good manufacturers cut them to fit comfortably over the top of your regular trousers, but it can be worth trying on a few pairs to see which you like best as styling is always very personal. Ideally they should not restrict your movement at all but equally there shouldn’t be too much loose flapping fabric as this can just get caught on stiles or your crampons.

Also make sure you can access your under-trouser pockets through your waterproof ones otherwise that could make paying for a pint at the end of your walk very awkward indeed!

The body of the coat should be sufficient long so that when climbing over stiles or bending over the lower back remains covered. Cuffs should be adjustable and long enough to cover the upper part of the hand  – and they need to accommodate your gloves too if you’re going to wear this coat in cold weather.

Zips are important because without appropriate flaps they can be the cause of water seeping in. A stormflap over the front of the zip which is held in place by velcro or press-studs is the norm on good jackets.  Waterproof qualilty versus breathability is a balancing act; good manufacturers will supply data to indicate levels of both. Ventilation through pit zips is sometimes an option as well.

Pockets should be accessible and easy to open even when wearing gloves. Some pockets can be mesh lined to aid with ventilation but this can cause water seepage so it’s worth prioritising your needs when choosing a jacket to suit the activities you plan to undertake when wearing it.