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Forty Below

The Forty Below® Light Energy Shorty Overboot

The Forty Below® Light Energy Shorty Overboot

Regular price $129.95 USD
Regular price Sale price $129.95 USD
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Shipping calculated at checkout.

Please provide your boot details in the fill-in sections below. We will pick the correct size for you.

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The Forty Below® Light Energy™ SHORTY Overboots are an ankle height insulating boot cover intended for trail running shoes and lightweight hiking boots.

Ideal for snowshoeing, alpine travel with light crampons, and simply adding warmth over camp booties, it’s a favorite for those looking to reduce bulk while staying warm in cold environments. The stretchy, nylon-covered closed-cell neoprene foam insulation is 3mm thick, providing effective warmth without absorbing moisture. Its flexible fit accommodates a variety of footwear shapes and clothing layers, making it easy to use across different trips and gear setups.

The durable sole is made from a rubberized fabric with a diamond-pattern texture that remains pliable in extreme cold, down to 40 below. While the sole is tough, it’s not meant for traction on its own, so these overboots are best paired with snowshoes, cross-country skis, light crampons, or strap-on traction aids that don’t use chains. A knit cuff at the top offers a secure, snow-blocking seal around the ankle, while a heavy-duty YKK® zipper runs to the toe for quick on/off and easy adjustment of laces underneath. A small toe loop allows attachment of a gaiter clip, and the overboots can be worn over or under gaiters depending on trail conditions.

Included are two sizes of closed-cell foam inserts (3 mm and 5 mm) for the bottom, allowing you to customize insulation and fit underfoot. To keep weight and packed size to a minimum, these overboots do not come with rubberized abrasion protection on the toe or sides, but you can easily apply a coating like Plasti Dip® to reinforce high-wear areas. Instructions are included with the product. For questions or help with customization, feel free to contact us directly.

  • Features & Details

    • Carefully designed to insulate trail running shoes and light hiking boots
    • Lightweight and compact design
    • Low-profile, dynamic fit for active use
    • Stretchy nylon-covered neoprene foam insulation on the sides for warmth and flexibility
    • Knit cuff top closure at ankle height—compatible with gaiters for deep snow use
    • YKK Heavy Duty zipper with small webbing loop at toe to attach agaiter clip
    • Removable closed-cell foam insert adds insulation underfoot to reduce heat loss
    • Flexible rubberized sole with a diamond-patterned grip for durability and traction
    • Easy to put on, even in cold conditions
  • Ordering Info

    • Use the fill-in boxes above to provide your shoe brand, model, size, and sole length. (We will select the best fitting size)
    • Sizes: XS–XXL (fits from women’s 4 to men’s 16)
    • Weight: only 12 oz (336g) per pair (size Large)
    • Hand-built in Canada!
  • Warning - Not for use with "Chain" style Traction Aids

    • Please do not use "chain" style traction aids with these overboots, as they will damage and cut through the fabric of the sole and upper materials quickly.
    • We suggest styles of traction aid products that have rubber bottoms with cleats (Kahtoola, Hillsound Flexstep, and Stabil).
    • These overboots CAN be used with quick strap style crampons and snowshoes.
    • Please do not use with snowshoe bindings that have small upward spikes that dig into the sole of the overboot

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