While the United States military has used wool blankets in the past, they have since transitioned to using synthetic materials for most of their bedding and clothing needs. This is due to a variety of factors, including the availability of more advanced materials that offer better performance and protection, as well as the cost and availability of wool blankets. However, wool blankets may still be used in certain situations where they are deemed to be the most appropriate choice, such as in extreme cold weather conditions where the insulating properties of wool are especially valuable. Overall, while the US military may still use wool blankets in some limited circumstances, they are not a primary component of their current bedding and clothing systems.