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 flexibilityFoam Superlight foam, Light weight, high stretch with great thermal retentionOuter material: Superflex jersey, durable high stretch jerseyNo Leaks Glued and blindstitched sealed seams externally No Leaks: Internal Superflex neo taped seamsDislocating chest zip entry prevents zip failureBack Zip entry system: £10 Metal YKK zipper quality durable easy back zip entry