Thinsulate Overbag

Synthetic-filled overbag for long Arctic expeditions. To protect and boost your down-filled expedition bag.
Weight
For clothing, weight is for size: M. For sleeping bags, weight changes with selected length/width. N.B. there may be some variation in the weights of finished products.
1050g / 37oz
Price
€468.67
Thinsulate Overbag
Geographical Magazine named our Overbag as one of its 'Ten of the Best' products for Antarctic mountaineering.
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Features & Description
Technical info
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Features

  • Cut wide to go over our warmest Xero expedition sleeping bags
  • Water-resistant Drishell fabric outer
  • Inner fabric: Lightweight M1
  • Thinsulate synthetic insulation, edge-stitched to allow full loft
  • Double layer wadding above: single on base
  • Short zip (on left side)
  • External draft baffle
  • Stuff sac
  • Pack size: 25 x 44 cm*
  • Mummy hood draws up close around head
  • Footpiece: ovoid shape to fit naturally over the foot area of an expedition bag
  • Black inner for quick drying
  • Colour: Blue
  • Options:
    • Full length zip (left or right)
    • Short and long lengths

*Please note: We make our stuff sacs big enough to allow fairly easy stuffing rather than reducing the bag to the tightest minimum.

Description:

A light synthetic-filled overbag which serves many purposes. On long trips it will protect your down bag from getting damp from the outside, push the freeze-point of any internal moisture outside the down, and dry comparatively quickly itself. It also adds considerably to the warmth (about 10°C / 18°F) of your inner bag and offers the versatility of a combined system.

Used extensively in the Arctic Circle.

Geographical Magazine named our Overbag as one of its 'Ten of the Best' products for Antarctic mountaineering.

Thinsulate

Thinsulate is a synthetic wadding specifically made for outdoor clothing. Its great lateral stability needs less stitch-thru than other waddings, giving excellent warmth/weight performance. Extremely warm and resilient.

Water-resistant Drishell outer fabric (weight: 54 gsm)

Ripstop nylon with an ultralight coating: achieves total windblock, along with high breathability and superior water resistance. Superbly efficient for a very light overall fabric weight.


Sleeping bag zips

  • No zip: The standard design on our lightest bags with open hoods. The simplest/lightest system which is a must for adventure racers. Up to 140gm (5oz) lighter than a full zip with draft tube.
  • Full zips: Full zip bags ventilate well, so they can be used over a wider range of temperatures.
  • Short zips: Short zips are lighter and pack smaller than full zips. A short zip & draft tube is up to 85gm (3oz) lighter than the full version.
  • Our full briefing on sleeping bag zips.

As used by Sir Ranulph Fiennes, Zoe Hudson, and many others.

Geographical Magazine named our Overbag as one of its 'Ten of the Best' products for Antarctic mountaineering.

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