Helping a friend look for a breathable maternity camisoles

I’m giving a hand my pregnant cousin in finding a comfortable maternity clothes specifically breathable camisoles yet it’s kind of difficult to find some.Many of the ones we saw in stores were at first glance very nice, but the material seemed way too heavy and not suitable to wear during summer or as loungewear. I suggest shopping online since availability in local shops in our place is limited. We browsed some sites like amazon, alibaba and positively it turned out there’s a lot of options there. I also had checked some clothing websites and to my surprise the quality stated are specified as soft fabrics and stretch fit designs which suits my cousin. I wonder what the usual sources of breathable maternity basics are for people here when they prefer not to overspend.