This is the Aqualung MK3 Thermal Boot Liner Drysuit Sock Scuba Diving Dry Suit Socks Features: Breathable, moisture-wicking, high loft, insulating polypropylene Polar Fleece inner lining StormProof 70 denier micro-ripstop water-resistant Taslon outer nylon facing Primaloft sandwiched between fleece lining and nylon facing - Primaloft is as warm as down, compressible, breathable and offers superior water repellency. Complement this with the MK2 Undergarments, or layer with the MK1 undergarments for colder conditions. Sock can be worn alone or with a very light moisture wicking sock to minimize laundering. Inspired by the Military who regularly dive in Arctic waters, the MK3 Sock is constructed of the following layers: Outer Nylon with heel stretch panels Primaloft Inner Fleece
