Step Forward orthotics will work successfully with a wide range of shoes, including backless sandals.
The orthotic cups to the structure of the foot, and will not slide forward in your shoes. With backless shoes we recommend the use of Velcro dots or strips under the heel to prevent the orthotics slipping out backward from under the foot.
Our orthotics will not work with rubber flip-flops. They may be a problem in very tight dress shoes. The heel may slip from the shoe (especially in well-worn shoes, or court shoes). In this case, heel grip (a strip of leather that adheres to the inside of the heel of the shoe) may help. We do not recommend our orthotics for shoes with a heel height greater than 7cm (although many people do exceed this and report good results).
Here are some examples of the wide range of shoes that can be used with Step Forward Orthotics.