An orthotic does not fit well into most sandals. Typically, a closed heel counter is required for the orthotic to not slide out. Some of my Houston podiatry patients have used Velcro or double-sided tape to hold an orthotic in with varied results.
There are some sandals specially designed to accommodate a custom orthotic. These include Aetrex, Bite, Finn Comfort, and Naot. They have a removable footbed that can be replaced with a custom orthotic. Also, select Birkenstock and Naot sandals can be custom made from a mold of your foot with an orthotic built in.
At Tanglewood Foot Specialists we now carry Revere sandals. These suportive Australian sandals provide superior comfort and support. Even better, the footbed of the sandal is removable and a custom orthotic can be constructed to fit seamlessly into the sandal. If you are reliant on a custom orthotic, these will be your best choice.
If you are having trouble fitting your orthotics into shoes or sandals, bring them to Houston podiatrist Dr. Andrew Schneider for an immediate evaluation.