100% cotton sofa fabric does offer breathability and cooling properties. Cotton is a natural fiber that is highly regarded for its breathability, comfort, and ability to regulate temperature. Here's why cotton is a good choice for a sofa fabric if you're looking for breathability and cooling:

Breathability: Cotton fibers have a porous structure, which allows air to circulate through the fabric. This characteristic allows heat and moisture to escape, making cotton fabrics feel light and airy. When you sit on a cotton sofa, the fabric won't trap heat against your body, helping you stay comfortable.

Moisture Absorption: Cotton has the ability to absorb and wick away moisture from the skin. This property can be particularly useful in warm or humid environments, as the fabric can help keep you dry and prevent a sticky feeling.

Natural Insulation: Cotton acts as a natural insulator, keeping you warm in colder temperatures and cool in hotter climates. Its breathable nature allows it to adapt to different weather conditions, providing a comfortable seating experience year-round.

Soft and Comfortable: Cotton sofa fabric is often soft and comfortable, providing a cozy feel when you sit or lie down on the sofa.

Hypoallergenic: Cotton is generally hypoallergenic, meaning it is less likely to cause allergic reactions for most people compared to synthetic materials. This is beneficial for those with sensitive skin or allergies.