Amazon.com: Outdoor Research Tundra Aerogel Socks – Warm 。MEN\'S & WOMEN\'S NON-SLIP SOCKS: These Outdoor Research Tundra Aerogel socks keep your feet warm and cozy and perfect to wear inside your home or the sleeping bag. The ankle cinch top keeps the socks in place and offers a tight fit. PRIMALOFT GOLD INSULATION: Featuring PrimaLoft gold insulation, these slipper socks offer lighter and stronger insulation that stays with you all day long. Their smooth 100% polyester micro suede soles take your comfort to the next level. WATER-RESISTANT PROTECTION: The water-resistant construction of these puffer Tundra cozy socks offers added durability. They are made of 100% polyester shell with 100% tricot lining and weigh 5.5 oz/155 g. PRIMALOFT AEROGEL INSERT: Featuring a compression resistant PrimaLoft Aerogel insert, these socks for women and men work as a thermal barrier between your feet and the outside weather. Note: Item has lived a past life, therefore minor imperfections are expected. I attempt to describe and show pictures, if possible, of any significant flaw. Please contact me with any questions prior to purchase. I will be happy to provide additional photos of the item, if necessary. Thank you for shopping.