A jumper, jumper dress, or pinafore dress is a sleeveless, collarless dress intended to be worn over a blouse, shirt, T-shirt or sweater. Hemlines can be of different lengths and the type of collar and whether or not there is pleating are also variables in the design.

A sweater or pullover, also called a jersey or jumper, is a piece of clothing, typically with long sleeves, made of knitted or crocheted material that covers the upper part of the body. When sleeveless, the garment is often called a slipover, tank top, or sweater vest.