O'Neill Wetsuits - O'Neill Youth Epic 5/4mm Back Zip Wetsuit - Black/ Smoke/ Lime :: Boy > Wetsuits. Krypto Knee padz: For added comfort and durabilityInsulation: FluidFlex Firewall for breathability and keeping warmMaterial: Crafted from 100% UltraFlex Neoprene for total freedom of movement5/4mm: For extra protection and warmth against the wavesPockets: External key pocket with loopDouble super seal neck: For maximum warmthBranding: O'Neill branding to chest and back zip pullerFastening: Velcro closure with zipper constructionSeams: Strategic seamless paddle zones. Glued and bindstitch seam construction for extra protection against the waves Size: 14 YRS.