Coldblack®
Coldblack is a finishing technology designed for textiles exposed to the sun for long periods of time. Coldblack prevents the textile from heating up and offers reliable protection against UV rays. For this double sun protection, Coldblack combines unusual characteristics: absorption and reflection.
The Coldblack finish is suitable for all fabrics worn mainly outdoors and exposed to strong sunlight. You can find it in outerwear, tennis, running, golf, workwear, etc. as well as in outdoor textiles for awnings, blinds, tents, etc.
Source: https://www.schoeller-textiles.com/en/technologies/faq-coldblack