Primark have some without the frills and bows without poppers x
I got a set from Asda x https://direct.asda.com/george/kids/girls-underwear-socks-tights/pastel-vests-10-pack/G007784799,default,pd.html?redirectFromInt=1&cmpid=ppc-_-geor-_--_--_--_-dskwid-_dm&utm_campaign=pla:_Fashion_-_Kids_BAU_-_Performance_Max&utm_source=google&utm_medium=cpc&gclsrc=aw.ds&gad_source=1&gclid=Cj0KCQjwtJ6_BhDWARIsAGanmKeh7FhTn7xyXg6WlrRGYW_ewFLpfEJb56LdOXNnnTHZTno-D7G1tCkaAsU4EALw_wcB
There in the bigger kids bit in the knicker isle check there there strappy ones though if you want thicker strap bits the boys ones is best x
Hiya, try the boys section. I’ve brought plain ones for my son for under his clothes 😊