Similar to the over-the-shoulder boulder holder, the mosquito net is a device worn by women on the breast. However, unlike the over-the-shoulder boulder holder, the mosquito net serves no conceivable purpose, as it is placed on top of small breasts (mosquito bites) and thus has nothing to hold up.
Bob: Dude, my girlfriend left her over-the-shoulder-boulder-holder at my house yesterday!
Dan: My girlfriend did that once, but that mosquito net fit right in my shirt pocket.
Bob: Why do they even make those?
Dan: To make my life harder.