Liz here: Swimwear Bottoms are loosely defined as a category of garment often worn when participating in aquatic activities, such as swimming or bathing. Swimwear is expected to fulfil varying requirements. For competitive swimmers, a streamlined and tight-fitting garment which reduces friction and drag in the water is favoured to enhance propulsion and buoyancy. For recreational use, swimwear needs to be fashionable whilst also maintaining its functionality, for example protecting the wearer’s modesty and withstanding the effects of elements such as water and sunlight.