A mosquito bar is an alternate form of a mosquito net. It is constructed of a fine see-through mesh fabric mounted on and draped over a box-shaped frame. It is designed to fit over an area or item such as a sleeping bag to supply protection from insects. A mosquito bar is designed for used while camping outdoors.

The mesh is weaved tight enough to stop insects from entering but loose enough to not interfere with air flow and the occupant’s capability to take in oxygen. The frame is usually self-supporting or free standing although it can be designed to be attached from the top to an alternative support such as tree limbs.