A rain poncho's primary function is to protect against rain, but its performance against wind and sand is limited.
In terms of material, ordinary rain ponchos are often made of plastic or thin rubber. These thin materials can block wind and sand to a certain extent, but their protection against larger dust particles and wind-borne sand is limited. When strong winds and sand are blowing, dust can penetrate through the poncho's seams, collar, cuffs, and other areas, rendering it incompletely protective.
In terms of design, rain ponchos are typically designed for rain protection and are not specifically optimized for wind and sand protection. They often lack a tight fit and don't wrap tightly around the body, allowing wind to easily penetrate the poncho, bringing in dust and sand along with it. Furthermore, the brims of rain ponchos are generally shallow, failing to effectively shield the face and neck from wind and sand.
However, some high-quality, well-designed rain ponchos can still provide some protection in mild windy weather. For example, a raincoat with an adjustable collar and cuffs and a longer brim can reduce the number of channels for wind and sand to enter and enhance the protective effect. However, in general, compared with professional wind and sand protection equipment such as wind and sand jackets and masks, the wind and sand protection performance of raincoats is poor.