Single Layer Bras are a less bulky, less expensive option. All single layer bras are racerback style and have bands to finish the neck, arms, and underbust. These will have less support than double layer bras but will still be a nice option.
The listing photo is an example of the style, but the dyed fabric will look much different.
These bras are made of 97/3 Merino Wool/ Spandex