Rain coat

Best fabric is tightly woven microfiber. Usually it will have brushed or sueded surface. The next best choice is nylon taffeta, crinkled textured nylon or poly/cotton poplin.

Test fabric by sprinkling some water on it and seeing how much is absorbed and how quickly it dries.

Tutorial on sewing rainwear and creating zip-out Thinsulate lining in Threads #46, page 33 – Sewing the Perfect All-Weather Raincoat

Updated