The 'best' waterproof eyeliner depends on individual needs and preferences. Gel and liquid formulas tend to offer the most robust waterproof performance, while pencil options often provide easier application but may require setting with a waterproof sealant.

Yes, truly waterproof eyeliners exist, but their effectiveness depends on proper application and formulation. Look for products specifically labeled 'waterproof' and consider formulas known for long-wearing properties like those containing silicone polymers.

Gel or wax-based eyeliners marketed as 'waterproof' or 'long-wearing' are typically the best choice for the waterline. Apply in thin layers and allow each layer to dry slightly before applying the next for better adhesion.

Yes, waterproof eyeliner is designed to withstand water exposure, making it suitable for pool use. However, chlorine and prolonged submersion can still break down the formula, so touch-ups may be needed for extended wear.