The best fabric for a wedding suit depends on the style of the wedding and the climate. Australian Merino wool, mohair and cashmere are the hallmark of quality and usually first choice for any high-quality suit. All our wool fabrics are Woolmark certified 100% Australian Merino wool—the finest wool in the world that is natural, soft, breathable, and biodegradable. Most importantly, wool is reactive to your body temperature, meaning that you can wear your wool in both the warmer and cooler seasons. For warmer climates, Australian Merino wool is breathable, however you could also choose a lightweight, breathable linen or cotton.