Can't mention the value of injini socks enough, especially their nuwool blend....when I started talking these up to friends and families a few years ago, almost all of them laughed.....guess what almost all of them are wearing now....nuff' said.
Looking for the best Performance Toesocks? Try Injinji! Designed to enable the human foot from the heel to the toes to function naturally inside a shoe.
www.injinji.com
tremendously cut down on moisture build up between toes, promotes moisture wicking and helps prevent blistering...I wear these by themselves in the early season and under a pair Farm-to Feet Ansonville or Cedar Falls or Point6 ExpeditionxHeavy Cusion socks when the temps fall out and I've been good
Point6 hiking socks and outdoor socks are the perfect socks for boots. Our merino wool will keep feet dry and blister-free while out on the trail. Point6 merino wool hiking socks provide the perfect balance of cushion and support needed while trekking miles through the terrain. The best socks...
point6.com
Our line of 100% American-made men's hunting and fishing socks – featuring the finest US merino wool – will keep your feet comfortable through field and stream.
www.farmtofeet.com
Like I mentioned above, I've bailed in the rubber boots in favor of a 9", high quality, waterproof hikers (Crispi Briksdal GTX's), the sock combo, coupled with the AS Boot blankets rolled up in the bottom of my pack have allowed to pretty much conquer any temps without frozen feet.
Full disclaimer, when the temps really bottom out, I am usually in my Arctic Shield Insulator Suit or Heater Body Suit, I still use the AS boot blankets, not because I need them for warmth as much as I want them to protect the interior of the suit from the lugs on my boots. I always get the largest size possible with the boot blankets and I wear a size 11 boot...if they are snug, you will likely have a problem with slipping them on and off and the zipper.
hope this helps.