EVERLIGHT hemp cap made of 100% hemp.

Industrial Hemp has numerous environmental benefits that promote sustainability.
For example, the hemp plant almost eliminates the need for herbicides, pesticides, and fungicides. And it requires less water than most fiber crops.
Ordinary clothing can only block 30%-90% of ultraviolet rays, while the hemp fabric, without special finishing, can shield more than 95% of ultraviolet rays.
EVERLIGHT hemp cap made of hemp canvas, this fabric can even block 100% of the ultraviolet radiation.

Hemp indeed classifies as a sustainable crop, and hemp fiber is one of the most representative of the green era of fiber.

https://everlight-trade.com/product/custom-hemp-baseball-cap/