UPF clothing is fabric that has been engineered or tested to block ultraviolet radiation, both UVA and UVB, from reaching your skin. Here's everything you need to know before buying it in Canada.
UPF stands for Ultraviolet Protection Factor. It is a rating system that measures how effectively a fabric blocks UV radiation from passing through to your skin. A garment rated UPF 50+ blocks 98% of UV radiation, meaning only 1/50th of UV rays penetrate the fabric to reach your skin.
Unlike SPF, which only applies to sunscreen and only measures protection against UVB rays, UPF measures protection against the full UV spectrum, both UVA rays (which penetrate deep into the skin and are linked to melanoma and premature aging) and UVB rays (which cause sunburn and surface skin damage).
This complete guide explains what UPF clothing is, how it works, what the ratings mean, what to look for when buying in Canada, and why it matters for anyone who spends significant time outdoors.
How does UPF clothing work?
UPF protection in clothing comes from two sources: the construction of the fabric itself and, in some cases, chemical UV-absorbing treatments applied to the fabric.
Fabric construction plays the largest role. Tightly woven fabrics with small gaps between threads allow less UV radiation to pass through than loosely woven fabrics. The fiber type also matters. Polyester and nylon naturally absorb more UV radiation than cotton or linen. Color affects UPF too: darker and more saturated colors generally provide higher protection than pale or light colors, though this varies by fabric type.
Some UPF garments also incorporate chemical UV absorbers, treatments that are applied to the fabric and chemically interact with UV radiation to prevent it from passing through. These treatments can significantly increase a fabric's UPF rating but may wash out over time if not properly formulated.
The important thing to understand is that the UPF rating of a garment is a property of the fabric, not something you apply or reapply. Once you put on a UPF 50+ shirt, you're protected for as long as you're wearing it, without any additional action required.
What do the UPF ratings mean?
UPF 50+ is the highest achievable rating under the standard testing protocol. It means the fabric allows 2% or less of UV radiation to pass through, equivalent to or better than a top-rated sunscreen applied correctly and consistently. The "+" designation indicates the fabric tested above UPF 50 in laboratory conditions.
For context: a standard white cotton t-shirt has a UPF rating of approximately 5 to 7, meaning it blocks roughly 80% of UV radiation and allows 15–20% to reach your skin. On a high UV index summer day in Canada, that's a significant amount of unmanaged exposure over several hours outdoors.
UPF clothing vs sunscreen: what's the difference?
Both SPF sunscreen and UPF clothing protect your skin from UV radiation, but they work differently and have different practical limitations.
Sunscreen is applied to exposed skin and must be reapplied every 90 to 120 minutes or immediately after heavy sweating to maintain its rated protection. Most sunscreens are only broad-spectrum if specifically labelled as such, and many people under-apply, leaving significant gaps in coverage.
UPF clothing provides consistent, passive protection for any skin covered by the garment. It doesn't degrade in the heat, doesn't sweat off, and doesn't require reapplication. The protection is identical on hole 1 and hole 18.
The most effective sun protection strategy combines both: UPF 50+ clothing for covered areas and broad-spectrum SPF 50 sunscreen for exposed areas like the face, neck, and hands.
How to tell if UPF clothing is genuine, what to look for in Canada
The UPF label has become common in Canadian retail but not all UPF claims are equal. Here's how to evaluate a UPF garment before buying:
Third-party lab testing. The most important question to ask is whether the UPF rating has been independently verified by an accredited laboratory. Any brand can print UPF 50+ on a label based on their own assessment. Third-party testing means an independent lab has measured the actual UV transmission through the garment and certified the result. Ask the brand directly if they can provide their testing documentation.
The fabric composition. Polyester and nylon provide naturally higher UPF ratings than cotton. Look for tight, high-density weaves. Very lightweight, stretchy, or loosely woven fabrics often have lower UPF ratings than their labels claim.
Wash durability. UPF ratings should hold through repeated washing if the garment is properly constructed. Chemical UV treatments that wash out quickly are a sign of lower-quality sun protection. Check whether the brand provides guidance on washing to maintain the UPF rating.
Coverage area. A UPF 50+ short sleeve polo protects your torso and upper arms. A long sleeve UPF 50+ polo also protects your forearms, the most UV-exposed area during a golf swing. Make sure the garment covers what you need covered.
Why UPF clothing matters in Canada specifically
Canada's reputation for cold weather leads many people to underestimate UV exposure. But UV radiation is not the same as temperature. UV index is determined by solar angle, altitude, and atmospheric conditions, not air temperature.
The Okanagan Valley in British Columbia, home to Enjoy the Vu, is one of Canada's only true desert climates and records some of the country's highest sustained UV index levels during summer. UV index 8 to 10+ is common on summer afternoons in Penticton, Kelowna, and Osoyoos. Southern Ontario, the southern prairies, and coastal BC also experience significant UV exposure during peak golf season.
At UV index 8, unprotected skin can begin to redden in as little as 15 minutes. A five-hour golf round in these conditions represents significant cumulative UV exposure. Exposure that compounds over a season of regular play and across a lifetime of outdoor activity.
Who should wear UPF clothing?
Anyone who spends regular time outdoors in Canadian summers benefits from UPF clothing but it's particularly important for:
- Golfers - four to five hours of continuous outdoor exposure during peak UV hours, with minimal shade
- People with a history of skin cancer or melanoma - including survivors and those with a family history
- People with fair skin, light eyes, or a high number of moles - higher baseline UV sensitivity
- Anyone who works or exercises outdoors regularly - cumulative lifetime UV exposure is the key risk factor for skin cancer
- Children - sun damage in childhood significantly increases lifetime skin cancer risk
Why Enjoy the Vu was built around UPF clothing
In 2018, our founder Jake MacDonald was diagnosed with malignant melanoma in Penticton, BC. He spent his life outdoors, golfing, hiking, playing sport in one of Canada's highest UV-exposure regions. After his diagnosis, he searched for UPF golf clothing that he actually wanted to wear. He found UPF labels. He found marketing claims. He couldn't find third-party lab-tested, long sleeve golf apparel designed for the Okanagan sun.
So he built it. Every Enjoy the Vu design is independently lab-tested to confirm its UPF 50+ rating, not self-certified, not assumed. The results are the foundation of every product we make.
As featured on CBC News, Enjoy the Vu exists because UPF clothing can genuinely change outcomes, and because everyone who spends time in the Canadian sun deserves access to verified protection that actually looks and feels like something they want to wear.
Related reading on The Vu:
UPF vs SPF: What Every Golfer in Canada Needs to Know