Foundation is a responsive front-end framework used by many WordPress themes. When your theme uses Foundation, WS Form can output HTML markup that is native to that framework.
This helps your forms dovetail seamlessly into your theme. WS Form also changes the breakpoint selector to match the available breakpoints in Foundation.
WS Form supports Foundation 6.4+, Foundation 6.0-6.3.1, and Foundation 5.x. All available WS Form field types are fully compatible with Foundation.