Yes, you can mix hair types in a bundle deal, but it depends on the seller's rules. Many hair sellers let people pick different hair types for their bundles, while others may want all bundles to be the same type.

Mixing hair types can make your hairstyle look more real and versatile. For example, mixing straight hair with wavy or curly hair can add depth and fullness to your look. This is good for those who want a layered look or plan to style their hair in many ways.
When mixing hair types, you should think about how they mix. Some hair types, like deep wave and kinky curly, have distinct curl patterns that may not blend well. If you plan to wear the bundles together, you might need to style them carefully for a smooth look.
Before you buy, ask the seller if they allow custom choices. Some sellers let you pick different hair types but may charge more for mixing. Others might offer bundle deals that already include different hair types for a pre-styled look.
Also, think about hair origin and quality when mixing types. If the hair comes from different places, the types may react differently to washing, heat styling, or coloring. Make sure all bundle deals are of the same quality and origin for a uniform look.
Mixing hair types in a bundle deal is possible, but always check with the seller, ensure the hair types go together well, and be ready to style them for a good blend.