Which feature of PPE is crucial when handling leaking batteries?

The crucial feature of Personal Protective Equipment (PPE) when handling leaking batteries is splash-proof protection. This is important because leaking batteries often contain corrosive substances and hazardous materials that can cause skin irritation or chemical burns upon contact. Splash-proof PPE helps prevent these harmful materials from splattering onto the skin or clothing, thereby offering a necessary barrier that reduces the risk of injury.

While other options might have some relevance in broader safety contexts, they do not specifically address the immediate risks posed by battery leaks. For instance, lightweight design can provide comfort but does not enhance protection against corrosive substances. Fashionable appearance holds no necessity in a hazardous environment where safety is paramount. Full body coverage, while useful, may not be practical or necessary in every scenario of battery handling. Specifically, splash-proof protection directly targets the danger of chemical exposure inherent in leaking batteries, making it the most vital feature in this situation.