Alto Astral by Byredo is a unisex Floral Aldehyde fragrance that debuted in 2025. Created by perfumer Jérôme Epinette, it features top notes of Coconut Water and Aldehydes, leading into a heart of Musk, Jasmine, and Incense. The scent is anchored by base notes of Cashmeran, Sandalwood, and Amber.