The black windbreaker is made of polyester and wool (55/45), and has a Velcro- in liner. The officer windbreaker has a knit collar, cuffs, and waist. Size 18R. Not certain what that translates into as I could not find the size chart for Sidran. However based on measurements below I've sized as Medium. Please refer to measurements below and compare to existing garment to ensure proper fit. Based on my experience with clothing it fits like a Women's Large:
23" across chest, 22.5" length - measurements taken with garment laid flat.