6 Best UPF Swimsuits For Sun Protection While Hiking

Whether you are scrambling up a sun-drenched canyon or embarking on a humid trek to a hidden waterfall, your skin is your first line of defense against the elements. Relying solely on sunscreen during long days on the trail is a losing battle, especially when sweat and water wash away protection. UPF-rated swimwear offers a reliable, consistent barrier that lets you focus on the horizon rather than your next application of lotion.

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Why UPF Swimwear Is Essential for Hikers

When you are deep in the backcountry, the sun’s intensity increases with elevation and reflection off water or rock. Unlike standard athletic wear, UPF (Ultraviolet Protection Factor) fabrics are engineered to block both UVA and UVB rays, providing a constant shield that doesn’t wear off. For hikers, this means less time stopping to reapply sunscreen and more time moving through the landscape.

Beyond UV protection, these garments are built for versatility. They handle moisture management far better than cotton or standard nylon, drying quickly after a creek crossing or a sudden mountain shower. By choosing high-performance swimwear, you effectively replace a heavy, sweat-soaked cotton tee with a piece of gear that works as hard as you do.

What to Look for in Sun-Protective Gear

The most critical factor is the UPF rating itself, with UPF 50+ being the gold standard for maximum protection. Look for tightly woven fabrics or those treated with UV-absorbing chemicals that remain effective even when wet. Remember that wet fabric can lose some of its protective properties if it stretches too thin, so prioritize a fit that remains snug and opaque.

Consider the cut and coverage based on your specific terrain. If you are hiking in dense brush, look for snag-resistant materials, whereas open, exposed alpine ridges might prioritize breathability and ventilation. Always check the moisture-wicking capabilities, as a garment that traps sweat will quickly become uncomfortable during high-output climbs.

Patagonia Nano Grip: Best for Water Hikes

If your hike involves frequent transitions between rocky trails and swimming holes, the Patagonia Nano Grip is your best ally. The internal lining utilizes a unique, non-slip material that stays firmly in place even when you are scrambling over wet boulders or diving into cold alpine lakes. It eliminates the constant tugging and adjusting that usually plagues swimwear during active movement.

Because this piece is designed specifically for high-intensity movement, it offers a secure, locked-in feel that won’t chafe during long miles. It is the ideal choice for adventurers who prioritize stability and performance over everything else. If you need gear that stays put regardless of how much you move, this is the one.

Carve Designs Beacon: Top Choice for Coverage

For those hiking in high-exposure areas like desert canyons or exposed mountain passes, the Carve Designs Beacon provides superior surface area coverage. Its longer silhouette and higher neckline offer significant protection for your shoulders and chest, which are often the first areas to burn. It feels more like a technical base layer than a traditional swimsuit, making it perfect for those who prefer a modest, utilitarian aesthetic.

The fabric is robust and durable, holding up well against the friction of a backpack strap or a waist belt. While it may be slightly heavier than minimalist options, the peace of mind provided by the extra coverage is worth the marginal weight penalty. This is a top-tier choice for hikers who want a "set it and forget it" approach to sun safety.

Athleta Clean Rise: Best for Active Movement

The Athleta Clean Rise excels for hikers who prioritize range of motion above all else. Its streamlined design is free of unnecessary hardware or bulky ties, allowing you to navigate steep switchbacks or technical terrain without restriction. The fabric is exceptionally stretchy yet retains its shape, ensuring it doesn’t bag out after a long day on the trail.

This piece bridges the gap between activewear and swimwear, feeling just as comfortable under a pair of hiking shorts as it does solo. It is an excellent option for fast-packers or thru-hikers who need gear that transitions seamlessly from a morning swim to a high-mileage afternoon. If you value mobility and a lightweight feel, this should be your go-to.

Coolibar Swim Tunic: Superior UV Protection

When you are trekking in extreme conditions where shade is non-existent, the Coolibar Swim Tunic offers the highest level of specialized protection. Coolibar is a brand dedicated entirely to sun safety, and their proprietary fabrics are rigorously tested to ensure maximum UV blockage. The tunic style provides extra coverage for your torso and hips, effectively acting as a long-sleeve sun shirt that can handle a dip in the water.

While it is more specialized than a standard bikini or one-piece, its performance in high-UV environments is unmatched. It is particularly well-suited for long-distance hikers who spend consecutive days in direct, harsh light. If your priority is absolute, uncompromising sun protection, this is the most reliable tool in your kit.

Summersalt The Marina: Best for Durability

The Summersalt The Marina is built for the hiker who puts their gear through the wringer. The compression-style fabric is remarkably resistant to pilling and abrasions, meaning it can handle the occasional scrape against granite or the constant rub of a heavy pack. It is designed to maintain its compression and structure even after repeated washings and long days in the sun.

This is a versatile, workhorse piece that balances style with ruggedness. It is perfect for those who want one piece of gear that can handle a weekend of camping, swimming, and hiking without showing signs of wear. If you need gear that will survive multiple seasons of heavy use, The Marina is a solid investment.

Seea Hermosa Surf Suit: Top Style and Utility

The Seea Hermosa Surf Suit is the perfect marriage of technical utility and thoughtful design. Originally crafted for surfing, its long-sleeve construction and front-zip entry make it a dream for hikers who want easy ventilation and maximum arm protection. The aesthetic is refined, but the performance is undeniably rugged, making it a favorite for those who want to look good without sacrificing functionality.

The front zipper is a standout feature, allowing you to regulate your temperature quickly as the trail moves from shaded forest floors to exposed ridgelines. It is a fantastic choice for hikers who appreciate gear that performs well and looks cohesive. If you want a piece that feels as capable as it is stylish, the Hermosa is the clear winner.

Proper Care to Maintain Your Gear’s UPF

To keep your UPF gear functioning at its peak, always rinse it with fresh water immediately after exposure to salt or chlorine. These substances can break down the fibers and the UV-blocking treatments over time, significantly reducing the garment’s efficacy. Avoid harsh detergents and fabric softeners, as these can coat the fibers and interfere with the technical properties of the fabric.

When drying, skip the machine dryer entirely. High heat is the enemy of elasticized fabrics and can compromise the integrity of the UV-protective weave. Air dry your gear in the shade, as prolonged direct sun exposure while drying can also accelerate the degradation of the fabric’s protective capabilities.

How to Layer Swimwear for Trail Comfort

Layering your swimwear effectively is the secret to all-day comfort on the trail. Wear your UPF piece as a base layer under lightweight, breathable hiking shorts to prevent chafing and add an extra layer of protection for your lower body. If the temperature drops, you can easily throw a sun hoodie or a lightweight windbreaker over the top without having to change.

Consider the total weight and bulk of your clothing system when planning for multi-day trips. By choosing a UPF swimsuit that doubles as a base layer, you save space in your pack and simplify your morning routine. Always prioritize moisture-wicking materials for any layer touching your skin to ensure you stay dry and comfortable throughout your hike.

Investing in quality UPF swimwear is a simple, effective way to elevate your hiking experience and protect your health on the trail. By selecting the right piece for your specific environment, you can move with confidence and enjoy the scenery without worrying about the sun. Now, grab your pack, choose your trail, and get outside to enjoy the sunshine responsibly.