2XU Silicone Swim Cap

$10 There’s nothing worse in the middle of a hard swim set than the feeling of your swim cap beginning to creep up your scalp, threatening to come right off. 2xu’s Silicone Performance Swim Cap stays put with its firm fit and streamlining effects. It stretches just enough, but without the excessive elasticity of some caps. With its matte underside, the cap won’t pull hair uncomfortably and, even with a ponytail tucked up under it, the cap covers ears effectively. A thicker silicone makes the performance cap a great choice for colder swims even as a base layer.