What type of layer is preferred for the base layer when diving?

The preferred base layer for diving is one that is wicking. This type of layer is designed to effectively draw moisture away from the body, helping to keep the skin dry. When diving, maintaining body temperature is crucial, and moisture can lead to a loss of heat. A wicking layer helps regulate temperature by moving sweat away from the body, allowing it to evaporate and keeping the diver more comfortable.

In contrast, thick layers can trap moisture against the skin, which can lead to overheating or a chilling effect once the diver enters cooler water. Silk, while it may feel comfortable, does not have the same moisture-wicking properties and does not effectively manage sweat in the same way synthetic or specialized wicking materials do. Therefore, a wicking layer is the optimal choice for a base layer when diving to enhance thermal comfort and efficiency.