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British hills are magnificent, but they are rarely kind to your feet. A long day on a Lakeland fell or a Scottish Munro can throw wet rock, deep peat bogs, loose scree and sudden showers at you in equal measure. Choosing the right waterproof walking boots is one of the most important decisions you'll make. The two main choices are leather and synthetic. Each has strengths and weaknesses, and the best boot for you depends on where and when you walk.

What British hill conditions throw at your boots

Think about a typical path. You start on a muddy track, climb onto wet rock steps, cross a boggy plateau, then descend steep, loose stones. Rain is frequent, and even on dry days, feet sweat inside waterproof linings. So your boots must cope with water from outside and moisture from inside. They need grip on slick rock and soft mud, support for tired ankles, and enough durability to survive abrasive gritstone and granite. No single boot does everything perfectly, but understanding the trade-offs helps you choose wisely.

Leather boots: traditional toughness

Full-grain leather boots have been the mainstay of British hillwalking for decades. They are incredibly durable, mould to your feet over time, and offer superb protection on rocky ground. A well-waxed leather boot is highly water-resistant, and the stiff construction gives excellent ankle support. The downsides are weight and breathability. Leather is heavier than synthetic, and it does not breathe as well, so your feet can get clammy on warm days. They also need breaking in and regular waxing to stay waterproof. For winter conditions, heavy packs and rough, rocky terrain, leather remains a superb choice. For summer low-level walks, they can feel like overkill.

Synthetic boots: lighter and faster

Synthetic boots use mesh, synthetic leather and suede. They are lighter, more breathable and dry out faster than leather. Many have a waterproof membrane, so they keep rain out whilst letting some sweat escape. They need less breaking in and are comfortable straight from the box. However, they are less durable, especially on abrasive rock, and they may lose their shape and support after a few seasons. On very wet, cold days, synthetic boots can feel less protective. They suit summer hillwalking, fast and light days, and easier paths. If you walk mostly in the warmer months and value comfort and low weight, synthetic is often the better bet.

Ankle support and sole grip: the technical bits

Ankle support comes from the height of the cuff, the stiffness of the midsole and the shape of the heel cup. Leather boots are generally stiffer, which helps when you are carrying a heavy rucksack over rocky ground. Synthetic boots can also offer good support, but check by twisting the boot and pressing the heel. A good boot holds your heel firmly and resists sideways flex. For sole grip, look at the rubber compound and lug pattern. Wet rock demands a softer, sticky rubber, whilst mud and peat need deep, widely spaced lugs. A compromise is usually best. Test the soles on a wet, sloped rock if you can. Deep lugs clear mud but can feel vague on rock; shallow lugs grip rock but clog quickly. Many hillwalkers choose a mid-depth lug with a sticky rubber heel and toe for edging.

Breathability and keeping feet dry

No waterproof boot is truly breathable. A membrane reduces sweat build-up, but on a long climb your feet will get damp. Leather with a membrane is very waterproof but sweat condenses inside. Synthetic with a membrane breathes better but still traps some moisture. The key is managing sweat with good socks. Wear wool or synthetic socks that wick moisture, and carry a spare pair. Gaiters help keep water out of the top. After a wet walk, dry boots slowly away from direct heat. Re-waterproof leather with wax, and clean synthetic boots with mild soap. Accept that damp feet are part of British hillwalking, but you can minimise the misery.

Fitting and care for long life

Fit is more important than material. Try boots on with the socks you will wear, ideally in the afternoon when feet are slightly swollen. You want a thumb's width at the toe, a firm heel hold and no pressure points. Walk around the shop, up and down steps. Lace them properly: use a heel lock if needed. Leather boots last longer with regular cleaning and waxing. Synthetic boots need less care but check for worn soles and delamination. Replace boots when the sole is worn flat, the waterproofing fails or the support has gone. A good pair should give you several hundred miles of happy hillwalking. Take your time, try several pairs, and choose the boot that fits your feet and your favourite British conditions.