• Insulated Forty Below Purple Haze Overboot front view purple with white logo and black sole
  • Insulated Forty Below Purple Haze Overboot back side view red with white logo and black sole protective heel
  • Insulated Forty Below Purple Haze Overboot side view red, purple, black with white logo and black sole white background
  • Insulated Forty Below Purple Haze Overboot front view red unzipped with climbing boot inside
  • Insulated Forty Below Purple Haze Red closeup on toe showing black protective coating
  • Forty Below Purple Haze Overboot bottom view of black sole white background
1 6

Forty Below

Forty Below® Purple Haze™ Overboot

Forty Below® Purple Haze™ Overboot

$239.95 USD
$239.95 USD
Sale Sold out
Shipping calculated at checkout.

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

Trusted by climbers for decades on Denali, in the Himalayas, and on extreme cold expeditions around the world, the Forty Below® Purple Haze™ Overboot offers reliable warmth and protection in harsh conditions.

Designed to fit over both double-shell and single mountaineering boots, this full-length insulated overboot is known for its unique stretch and versatility. It accommodates a wide range of mountaineering boots—including high-volume models like those from La Sportiva and Millet—making it a top choice for serious alpine use.

Included is one of our “peel and stick” stretchy Repair Patches for use when on a trip.

Note: The Purple Haze™ Overboot is not compatible with AT Ski or Snowboard boots due to their increased girth. For those styles, we recommend the Forty Below® Fresh Tracks™ Overboot.

  • Features & Details

    • Knee-height design with full insulation coverage around and under the boot
    • Made with 5mm stretchy neoprene closed-cell foam covered in durable nylon
    • No gaps in insulation – panels are glued and stitched (inside and out) with no sewn-through seams
    • Trim fit — not bulky
    • Compatible with a wide range of crampon binding styles: (Step-in, New-matic / Hybrid, Strap-on)
    • Toe and heel feature triangular thinner neoprene panels for crampon toe bails and heel levers to compress and rest securely
    • Reinforced with thin rubber paint on toe, heel, and lower side areas for abrasion resistance and extra durability without losing stretch
    • Front closure with large YKK® heavy-duty zipper (Insulated neoprene flap underneath for added snow and heat protection)
    • Easy to repair – crampon poke holes can be glued
    • Repair instructions included and available HERE

  • Ordering Info

    • Use the fill-in boxes above to provide your boot brand, model, size, and sole length. (We will select the best fitting size)
    • Sizes: XS–XL (fits from women’s 4 to men’s 16 in double-shelled mountaineering boots)
    • Colors: Black, Red, Purple, Pink
    • Weight: Only 1 lb 3 oz / 538g per pair (size Medium)
    • Hand-built in Canada!

  • Additional Uses for Overboots in Camp

    • Use as a sit pad
    • Add over camp booties for extra insulation and snow protection
    • Stuff with clothing to create an “L”-shaped camp pillow
    • Use as an insulated bag to store water bottles overnight (with Bottle Boots™)
    • Place under sleeping pad for extra insulation in specific areas
    • Cushion pouch for protecting delicate items during travel

Crampon Compatibility

  • Forty Below Purple Haze Overboot insulated with crampon attached wire to bail binding style

    Strap Toe/Flip Lever Heel

    Double Boots & Single Boots

  • Forty Below Purple Haze Overboot insulated with crampon attached flip lever heel binding style

    Wire Toe/Flip Lever Heel

    Double Boots Only

  • Forty Below Purple Haze Overboot insulated with crampon attached strap on binding style

    Quick Strap-On Binding

    Double Boots & Single Boots

Please Note:
Single boots typically do not work with overboots and “wire toe bail” crampon bindings, as there is usually not enough space on the toe groove to accommodate both the crampon bail and the overboot fabric. Feel free to contact us with any questions or to discuss your specific setup.

WARNING:
The user must try on the crampons to each boot and overboot combination to confirm a proper fit! Some crampons will not fit certain combinations due to the condition of the boot, crampon, or shape and size relative to the shape and size capabilities of the crampon. The user must confirm proper fit prior to using. Please contact us if you have any questions or would like to discuss this for your specific set-up.

PLEASE NOTE: CAUTION
Using overboots with some snowshoe bindings advisory:
These overboots are strong, but will not resist the damage that can be caused by some snowshoe binding base plates. There are now several models of snowshoes with upward facing “spikes” and “raised ridges” made of strong plastics and sharp shapes, that will immediately cut into the fabric sole of the overboots, and is very difficult or impossible to repair. The general purpose of these snowshoe binding design is to grip the rubber sole of the boot that is in the binding. Many of these spikes and sharp shapes have shown to cut into the rubber of the sole of boots. It is advised to put a thick rubber layer on top of the snowshoe binding base to protect the overboot from damage. This type of damage to the overboots will not be covered under warranty. We do have some suggestions on different ways people have made accommodations to this, so please contact us to discuss.

Ed Viesturs on the Purple Haze™

See it in Action

(Click or tap image to enlarge and view description)

Related Products