Maternity belts are one of the best aids to ease the discomfort of pregnancy. The treatment of low back pain during pregnancy can be as simple as wearing a maternity belt. They don't do the trick for all women that are pregnant, but most said the pregnancy belt did improve their lower back pains. There are a few different styles to these belts that you will need to consider. The first types are those that resemble a basic back brace with a single strap around the lower back and supports the belly. Others maternity support belts have a 2nd strap that goes above the belly. The key is getting the support for your lumbar and abdominal regions.
Source: http://www.maternityfolks.com/best-pregnancy-support-belt-reviews