The best clothing to wear in the summer is lightweight and breathable fabrics that allow air to flow through and keep you cool. Here are some clothing options that you can consider:

1. Cotton: Cotton is a natural and breathable fabric that absorbs sweat and dries quickly. Cotton dresses, shorts, and t-shirts are great options for hot summer days.
2. Linen: Linen is a lightweight and breathable fabric that is perfect for summer. It is also durable and gets softer with each wash. Linen pants, shorts, and dresses are perfect for summer days.
3. Rayon: Rayon is a synthetic fabric that has a similar feel to cotton and is also lightweight and breathable. It is often used to make dresses, tops, and skirts.