Yes, disposable rain ponchos do work. They are typically made of lightweight, waterproof material and are designed to prevent rain from soaking your clothes. They’re usually large enough to cover most of your body and often fit over any other clothing or bags you might be carrying.
However, disposable rain ponchos are not typically as durable as regular raincoats and may not stand up to very heavy rain or prolonged use. They are best used for unexpected showers or one-time events where carrying an umbrella or wearing a heavy raincoat may not be practical or convenient.
Please keep in mind that while they are convenient, disposable rain ponchos create waste, so consider recycling them if possible, or choose a reusable option if you frequently need to protect yourself from rain.