This is the DUI Xm450 Jumpsuit with Thinsulate Drysuit Undergarment with Ultra & Polartec Powerstretch Features: Made with Thinsulate Ultra Insulation (400 gm/gm) which provides the greatest amount of warmth per unit of thickness available -black Polartec PowerStretch Pro (560 gm/m2) panels in arms, waist, legs and wrist for maximum stretch, warmth and comfort Wind-and-spray resistant outer shell with high tenacity technical ripstop Fleece lining for warmth and comfort Antimicrobial liner Two-way torso zipper Two zippered hip pockets Zippered chest pocket Stand-up collar for extra warmth 2 Stirrups and thumb loops Includes DUI DiveWear Tote Bag Men&';s sizes XS, S, M, MT, L, LT, XL, XLT, XXL, 3XL, 4XL Rated for temperatures ranging from 28F to 45F Top choice for for extended duration, decompression and polar diving! "