Speech of opposition : It is not Sunnat to use Turban all the time. So they do not use turban even during the time of Salaat.
What is said in Islam : Using turban is Sunnat for all the time. Because Huzur Pak Sallallahu Alaihi Wasallam used turban all the time. It in Sunnat for both the time during Salaat and outside of Salaat. It worth 70 times more Saowaab by praying Namaaz with turban.