XCEL'S PHOENIX SERIES: Superior Stretch meets Sealed Infrared Warmth. Phoenix falls in the high-stretch and warmth category of the Xcel lineup. It offers Channel Flex and Ultra-Stretch that delivers superior performance. It’s combined with ThermoLite IR enhancing warmth throughout the interior with sealed seams, making this Men's 3/2mm extremely comfortable. MATERIAL CHANNEL FLEX UPPER BODY NEW PLUSH THERMO LITE INFRARED NECK TO ANKLE 100% ULTRA FLEX LOWER BODY NANOPRENE LITE JAPANESE LIMESTONE GLIDE SKIN COLLAR DESIGN WATERTIGHT ZIPPER ENGINEERED FIT SYSTEM CONSTRUCTION TRIPLE GLUED AND BLIND STITCHED SEAMS FUSIONX TAPE NEXSKIN WRIST & ANKLE SEALS WATER BASED GLUE