IntelliBrella™ Tee

Black cotton tee. The reversed logo lockup, the BY GEOPHYSIS rule and the “Intelligent Spectral Protection. Engineered by Physics.” line printed across the back.

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Size Fit guide below

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Pre-orders are not open yet. A launch date is coming shortly. When they open, payment is taken at the point of order — pre-orders fund the production run. You will receive an estimated dispatch window by email, and updates as production progresses. See the Terms of Service for returns and cancellation.

The full IntelliBrella™ lockup, reversed to white and printed across the upper back: the aperture mark, the wordmark, the BY GEOPHYSIS rule, and the brand line — Intelligent Spectral Protection. Engineered by Physics.

Classic unisex cut with a straight body and set-in sleeves, shown here in a relaxed fit. Detailed measurements are published with the final production run. If you are between sizes, size down for a closer fit.

Cotton. Wash cool inside out with like colours, tumble dry low, and do not iron directly over the print. Fabric weight and blend are confirmed with the final production specification.

This is a branded cotton t-shirt, not certified UV-protective clothing. No UPF rating has been established for it and none is claimed. If you want fabric-based sun protection, public-health guidance recommends tightly woven or purpose-made ultraviolet-protective clothing.

The other half

The product it's named after.

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IntelliBrella™

Transparent UV-protective umbrella. Clear canopy, white trim, black crook handle.

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Why a clear canopy?

Visible light and ultraviolet occupy different parts of the spectrum. A material can pass most of the visible band while reducing transmission across the ultraviolet bands — which is the entire idea.

Read the science