DD has a large birthmark on her arm/shoulder/back which needs to be covered from the sun until it can be treated. Suncream is not sufficient on it's own so we need a physical sun barrier. Last summer we got some pretty 60's style tunic dresses from M&S in light cotton but there are none about atm. Wee have a few long sleeve t-shirts but they are just not loose enough to keep her cool and she then scratches where she is sweaty.
Any help appreciated.