When wearing a white shirt, it’s crucial to choose the right undergarments to prevent transparency, maximize comfort, and enhance fit. Essential items include a plain white undershirt, which provides coverage and absorbs sweat. For a more versatile option, nude or beige undershirts offer subtle layering. Bras and camisoles provide support and coverage, while tank tops offer breathability and flexibility. During colder months, long-sleeved undershirts provide warmth and insulation. Additionally, consider the neckline and fit of the undershirt to complement the style of the white shirt. Remember to prioritize breathable fabrics and appropriate size and fit for ultimate comfort and confidence.