FeaturesValue, and performanceInner lining Carbon Graphene 015 internal lining in the core body area Innovative new graphene coated yarns trap and retain heat more efficiently for longer making it incredibly warm, knitted to allow the material to stretch and reduce water absorption and dry super-fast Thermo Silk in the arms and lower legs for increased warmth and flexibility: ¢ Foam Superlight foam, lightweight, high stretch with great thermal retentionOuter material: Superflex jersey, durable high stretch jersey No Leaks Glued and blindstitched sealed seams externally No Leaks: Internal Superflex neo taped seams on strategic seamsDislocating chest zip entry prevents zip failureentry system: quick easy on and off chest zip entry system