Our Coolasun Base Layer provides effortless sun protection, perfect for wearing alone or layering. Designed with an athletic fit for comfort and flexibility, it allows easy movement without being skin-tight. The cooling, lightweight, breath...
Reviews
4.5
49 ratings
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Great basic top!
It’s comfortable, soft, and cool. I’ve had to cover up since my skin cancer diagnosis and living in hot Southern California this shirt is the answer. I’ve bought it in so many colors it is almost my daily go to.
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Lisa · April 6, 2026
I rated this as running small when compared to my usual size (small) in all your other tops. Having said this, I do want base layers to be snug and this lightweight shirt suits me well.
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Paula · December 2, 2025
Love this shirt!
I just purchased my second Base Layer UPF 50+, and it won't be my last if they issue some more fun colors. My first was white, and now I've got the pretty pink one. I'm a size 4, and bought the small-size shirt, which is flattering and fits great. The fabric is cooling to wear and cool to the touch on a hot day. I've even worn it under wool base layers because it wicks moisture and moves easily underneath.
