People often get confused with SPF and UPF. Although both serve the same purpose, the two are very different in function.

To start off, SPF stands for "Sun Protection Factor" while UPF stands for "Ultraviolet Protection Factor." Both SPF and UPF protect surfers, swimmers, runners, cyclists, and other land and aquatic outdoor hobbyists from the sun.

Many people are asking about UV-blocking effectiveness of these fabrics. Here's some useful information you need to consider in choosing your fabric.

Reading SPF and UPF ratings

SPF ratings are usually seen in sunscreen and sun tan bottles we buy. It's used to rate skin care products. In short, SPF rating is for cosmetic purpose.

Clothing is what uses UPF. The fabric’s ability to block UV rays is the one being measured. UPF ratings vary with each fabric.

UPF rating is determined by a number of factors. Fabric color, weave, composition, and weight of the material play a role in how much the fabric protects your skin. 

A pair of dark blue denim is a n example of fabric with good UPF rating because of its thickness and opacity. It can block UV rays better. Ultraviolet protection can be cut by as much as half when they are light-colored or get wet.


What is the best protection from UV rays?  

Your best bet to cover your skin from those harmful rays are wearing rashguards, leggings, and jackets. They offer the highest possible protection from the sun.

Opt for darker colored fabric depending on how hot it is outside. Even if two fabrics carry the same rating, darker colors in offer better protection than light colored ones when wet.

Other factors such as stretching and stretching and normal wear and tear on the fabric can also affect UPF levels. It is strongly recommend to accompany your outer wear with sunscreen, hats, and other sun protective elements.

Sportek has the best fabric for rashguards, leggings and long sleeve bathing suits. It's highly durable, eco-friendly, and powerfully insulating which all play