If there's a one-word piece of advice regarding what to pack for your cruise to Alaska, it's "layers." With the right gear, so you can focus more on the incredible wildlife surrounding you and less on making sure you're comfortable in Alaska's unpredictable weather. Here's what we recommend to buy for the crown of your head to the tips of your toes.

Nobody likes cold feet. People Socks uses a high-quality merino wool blend for these unisex hiking socks to keep tootsies warm and dry while exploring the Last Frontier. (Did you know that wool is key for quick-drying clothes? So ditch the cotton on this cruise.) The socks, which come in a variety of neutral colors, are all made in the U.S. and offer an anti-itch guarantee.

Perhaps the most important thing you can pack for your cruise to Alaska is a comfortable and durable pair of shoes. Because of the ever-changing elements, it's helpful if your kicks are also waterproof. We recommend checking out Merrell's line of hiking boots for men and women. Even if you don't plan on doing any heavy-duty hiking, a supportive sole and tough materials will protect your feet and propel you forward on a full day of sightseeing. Just be sure to break your new shoes in before your trip.

For those chillier days where you expect to spend plenty of time in the fresh Alaskan air, consider adding a thermal layer to your ensemble. Our pick is Patagonia's Capilene thermals; top and bottom sold separately. This toasty but breathable base layer is designed to glide easily under top layers, reducing bulk. Plus, the moisture-wicking material is treated with Polygiene, an antimicrobial and anti-odor compound, so the side effects of sweat won't hold you back from adventurous shore excursions.

When packing for Alaska, you want items that will not only travel well, but also multitask. Trail pants from Columbia Sportswear are primarily made of nylon, which is a lightweight and moisture-repelling material, that's simple to roll into a suitcase without wrinkles. They also provide sun protection and stretch, with the ability to roll the pant up into a capri, and in some cases, zip a piece off to convert into shorts -- that's two pairs of pants in one! Browse all men's and women's styles to find the right fit.

What you wear over your long (or regular) underwear is considered your insulating layer. Choose synthetic materials for their coziness but also their lightness. A fleece top from The North Face is a no-brainer. We like that it's machine washable and comes with a hood. Long sleeves might seem a bit odd considering Alaska can have some sunny summer weather, but remember you are protecting yourself against hungry mosquitoes as much as you are the elements.