From O'Neill

Thermo-X layering fabrics provide incredible insulation with low bulk and quick-dry properties.

• Maximum Base-Layer Insulation
• 4-Way Stretch Fabric
• Wind-Proof Smoothskin
• Rash Protection
• Strategic Seam Placement
• Super Low Neck: No Interference with Wetsuit Neck
• Boardshort Connector
• 210g Polyester/Spandex with HyperDry for maximum insulation and minimal water absorption
• Thermo-X HyperDry
• Flatlock Stitched Breathable Seams