The Air Kal2 from Rinati Lakel is the perfect everyday shaper with the added bonus of having mesh as the primary material making it suitable to be worn in warmer weather/climates. The volume in the back is between small and medium, it also has an opening where you can remove/add back in the stuffing.
It has a velvet band attached all the way around making sure that it stays on/keeps your hair covering on your head. Note: the white has a thinner velvet band, please see the photos for more details. It has an elastic/button closure in the back and it's very comfortably worn by a variety of head sizes.