Which item is essential in a first aid kit?

Disposable gloves are essential in a first aid kit because they help maintain hygiene and protect both the caregiver and the injured person during the administration of first aid. When providing assistance, using gloves minimizes the risk of cross-contamination and the transmission of infections. This is particularly important when dealing with open wounds or bodily fluids.

While the other items listed may serve a purpose in a first aid kit, they do not carry the same level of importance when it comes to universal precautions and maintaining a sterile environment. Perfumed hand sanitizer, for example, may not be effective against certain pathogens and could potentially irritate sensitive skin. Old band-aids may not adhere properly or provide adequate protection due to deterioration, and cotton balls, although useful for cleaning or applying medication, do not offer the same protective barrier as gloves. Thus, disposable gloves are a critical and fundamental component for safe first aid practices.