What Is an S-Wave (S-Fold) Heading?

An S-Wave, also known as an S-Fold or wave heading, is a curtain style that creates a smooth, continuous ripple across the top of the fabric. Instead of individual pleats, the fabric is fitted with a structured buckram tape along the back of the header, which is then clipped into a dedicated wave track. This spaces the fabric evenly to form a soft, uniform “S” shaped wave from one end of the curtain to the other.

How It’s Made and Hung

S-Wave curtains rely on a specific track and tape system rather than a standard rod or rings, so they are not usually compatible with existing tracks. The tape is sewn to the back of the fabric, and gliders clip into the track above, allowing the curtain to glide smoothly and quietly when opened or closed. Wide-width fabrics are often used so the wave can run continuously across large windows without visible joins.

Best Suited For

• Floor-to-ceiling or wide windows, where the full wave effect can be appreciated
• Modern, minimalist interiors that suit a clean, architectural line
• Living rooms and master bedrooms, where the curtain is a considered design feature
• Fabrics with enough weight and body to fall evenly into the wave

Things to Consider

Because the wave relies on a dedicated track and tape system, S-Wave curtains generally can’t be retrofitted onto an existing rod. The heading works best with fabrics that have some structure and weight; very light or flimsy fabrics may not hold the wave shape as crisply. This heading style is also a popular choice for sheer curtains covering large expanses of window.