noun
thin blanket; light bed cover
A lightweight covering used on a bed, such as a thin blanket or summer coverlet.
夏は薄掛け一枚で寝ています。
In summer I sleep with just a thin blanket.
この薄掛けは肌触りが良くて気に入っている。
I like this light bed cover because it feels nice against the skin.
Compound of 薄 (usu, 'thin') + 掛け (kake, 'covering'). The reading うすがけ is a straightforward combination.