It's gotten a bit more difficult to find Jack Black products. I'm glad I found them here. Shipping was fast as well.
Willoughby Micro Crew Lightweight w Cushion Sock | Taupe
True to its name, The Backcountry Puffy is engineered to excel in portability, space-efficiency, and performance. It features a SummitShield™ ripstop inner liner for weather-resistance on the inside, VersaWeave™ 30D poly shell on the outside, and upgraded NanoLoft® Insulation for improved warmth, durability, and easy maintenance. Rumpls warmest, toughest, and most capable adventure blanket to date.