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Forty Below Synthetic Fill Camp Booties SPOTLITE REVIEW

Ultra warm non-slip booties for snow camping, and they coordinate well with daytime snow travel footwear.


Overall Rating: Recommended

These insulated booties are specifically designed for winter camping and mountaineering. As such, we expect them to weigh a little more because of the need for more durable fabrics and a rubber sole for slip resistance on snow. However, we would expect to see a more state-of-the-art insulation like Primaloft used in a specialized insulated bootie targeted for mountaineering.

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by Will Rietveld and Janet Reichl |


In our Lightweight Footwear Systems for Snow Travel project (to be published soon), one area of focus was coordinating a daytime footwear system with a snow camping footwear system. For serious cold, we wanted a warm bootie that could either be worn by itself on snow or worn inside an overboot. The Forty Below Synthetic Fill Camp Booties are designed for mountaineering and winter camping and weigh just 10 ounces per pair.

Forty Below Synthetic Fill Camp Booties SPOTLITE REVIEW - 1
The Forty Below Synthetic Fill Camp Booties (top left) have a Cordura rand, and nylon taffeta upper, and drawcord closure. The inside (top right) is taffeta nylon. The sole (bottom left) is a thin rubber dot material, and the booties come with a removable 3/8-inch closed-cell foam insole (bottom right) for extra underfoot insulation.

These booties are designed for snow camping. The bottom is a thin rubber dot material that provides excellent traction on snow. There is a durable Cordura rand, and the uppers and lining are nylon taffeta. They are insulated around and under the feet with a continuous filament polyester fiber. There is a drawcord and cordlock closure at the top. The booties come with a removable closed-cell foam insert to provide extra underfoot insulation.

The booties are also designed for mountaineering. While other synthetic insulated booties may be lighter, many don’t have a waterproof rubber sole to get good traction on packed snow and to resist wetting. They are designed to be worn inside a plastic mountaineering boot with their liner removed. That system provides warm feet plus good support and traction around camp while the boot liners are being dried.

Forty Below Synthetic Fill Camp Booties SPOTLITE REVIEW - 2
The Forty Below Synthetic Fill Camp Booties worn while camping in an igloo.

We wore the Forty Below Booties on numerous snow camping trips over the better part of two winters, and found them to be lightweight (considering their rubber sole and thick insulation), warm, and dependable. We wore them by themselves on packed snow, or inside overboots in camp to keep them as dry as possible so we could wear them in our sleeping bags.

For snow travel in frigid temperatures, a good coordinated lightweight footwear system is the Forty Below Camp Booties inside Forty Below Light Energy Overboots in camp, and the Light Energy Overboots worn over a lightweight insulated boot on snowshoes or over climbing boots during the day.

Features and Specifications

  • Manufacturer: Forty Below (
  • Sizes: S,M,L,XL (fits women’s 5 to men’s 18)
  • Insulation: continuous filament polyester fiber that has been laminated to one side of the shell fabric for stability, and also silicone treated to resist bunching of the fibers and allow for better moisture evaporation
  • Fabric: Sole is rubber dot material, rand is Cordura nylon, upper and lining are nylon taffeta
  • Features: Non-slip sole, insulation around and under the foot, durable Cordura rand, drawcord and cordlock closure, removable closed-cell foam inserts
  • Weight: Size Small is 7.3 oz/pair (207 g), size Large is 9.7 oz/pair (275 g); manufacturer specification 10 oz/pair (283 g) for size Medium
  • MSRP: $59.95 US


"Forty Below Synthetic Fill Camp Booties SPOTLITE REVIEW," by Will Rietveld and Janet Reichl. (ISSN 1537-0364)., 2007-03-16 03:00:00-06.