When wearing a wetsuit for activities like diving, surfing, or swimming, it's essential to wear appropriate undergarments to enhance comfort and functionality. Here are some common options for what to wear under a wetsuit:

Swimwear: Many people wear swimsuits or swim briefs under their wetsuits. These are designed to be worn in water and won't retain excess water, providing a comfortable layer between your skin and the wetsuit.

Rash Guard: A rash guard is a tight-fitting, stretchy shirt made of materials like nylon, spandex, or polyester. It helps prevent chafing and provides an additional layer of insulation. Rash guards are particularly useful for protecting the skin from irritation caused by rubbing against the wetsuit.

Neoprene Shorts or Pants: Neoprene shorts or pants can be worn under a wetsuit to provide extra insulation and protection for your lower body. They are especially beneficial in colder water conditions.

Compression Shorts or Leggings: Compression shorts or leggings made of moisture-wicking material can be worn under a wetsuit to enhance comfort and reduce friction. They also provide some insulation and help with muscle support during water activities.

Sports Bra or Athletic Top: For women, a sports bra or athletic top made of quick-drying material can provide support and comfort under a wetsuit.

Thin Undergarments: Some people prefer wearing thin, moisture-wicking undergarments like synthetic underwear or sports bras under their wetsuits for added comfort and hygiene.

When choosing what to wear under a wetsuit, it's essential to consider factors such as water temperature, personal preference, and the type of activity you'll be doing.