Rating: 5 / 5
These are a sleeping gear item for me. Some people have commented they can be worn for camp booties, in the snow. IMO I don't really like them for that use. I am afraid of getting snow or water into the seams and having them get cold in the middle of the night.
They are comfortable, warm, fit great, have sole that will withstand walking on.
The Integral Designs website states:
"The 4oz Primaloft Sport insulation and Pertex P685 shell fabric ensure a system that is soft, comfortable and water repellent, with 1/2" (1 cm) loft around the foot. The back panel of Powerstretch fleece makes the Hot Socks easy to slide on and keeps them snug around the feet and ankles. The footpad is reinforced with abrasion resistant 500 denier cordura, which is suitable for use inside huts and tents, but is still soft enough for use as a sleeping sock.
Packed size: 6" long x 3" silcoat stuff sack
Weight: 4.5 oz (130 g)
Unit price: $40.00 USD"
I got the red ones so they would be easy to see in the dark or dusk, and so I wouldn't loose them as easily as something that blends into the shadows. Plus, for psychological reasons I'd rather see red if I am worried about cold than black or blue.
They come with a stuff sack, good stuff sack ... not cheap or shoddy. I don't use the stuff sack, so I figure the cost can be reduced by the cost of buying a UL stuff sack from Integral Designs.
They are so functional, warm, and so well made, plus I will be taking them with me for winter, spring, and fall cold nights, so they get a 5. Here they are with the Montbell Thermawrap pants. This is the sleeping gear, plus socks and capilene or wool baselayer underneath which allows me to use my MH Phantom 32 F down bag in temps down to 19 F so far, and I assume down to 0 F, camped on snow in a Rainshadow 2 Tarptent by H. Shires.
Update: Now that I have had a chance to use them several times, they are still a 5 because of weight and warmth, functionality as sleeping gear. I must wear my wool socks in them or they get cool standing or sitting around in 20 - 32 F air, no wind or humidity / precip. Testing with one foot w/o socks the soles get pretty cold, but not too bad very quickly. I might try buying a size smaller if I was to use thinner, lighter weight, or no socks with them.