Zone3 Heat-Tech Neoprene Warmth Swim Cap. Anyone who has experienced ‘brain-freeze’ when swimming in cold water will know how valuable triathlon skull caps can be to get you going! The Neoprene Heat-Tech Warmth Swim Cap offers fleece-lined insulation while maintaining optimal hydrodynamics through the water.

The biggest complaint from swimmers who use one-piece caps is that they can feel ‘tight’ under the chin and have no adjustability. This design is focused on making this cap the best fit possible, with a Velcro strap under the chin to cater for different head sizes.