Montane Deep Heat -20 Sleeping Bag

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  • Montane Deep Heat -20 Sleeping Bag
  • Montane Deep Heat -20 Sleeping Bag
  • Montane Deep Heat -20 Sleeping Bag


Montane Deep Heat -20 Sleeping Bag

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A specialist alpine sleeping bag for high altitudes and low temperatures.


The Deep Heat is a specialist sleeping bag and almost certainly a leader in its class. It is a piece of sleeping equipment designed for some of the harshest mountain environments in the world, from the New Zealand Alps in winter to the greater ranges in Asia.

Highly tailored with an engineered, ergonomic form and foot box, it guarantees the user to sleep in absolute comfort, even in the most extreme conditions.

The upper part of the bag is a design evolution taken from the most technical of MONTANE® clothing garments, allowing the hood to securely fit and move with the head whilst sleeping and offering sheltered protection whilst sitting upright either in a tent or on a bivouac.

An outer shell of PERTEX® Endurance provides an elevated level of weather resistance. Trapezoidal baffle construction reduces cold spots and a well-considered down layout maximises heat retention even whilst sleeping on the side.

  • Goose down fill weight: 885g / 31.2oz

  • Weight: 1,464g / 51.6oz

  • Weight stuffed: 1,524.2g / 53.8oz


  • PERTEX® Endurance Mini Rip-stop outer provides exceptional weather resistance with a high durable water repellency and can shed ice and snow easily
  • PEAQ Down liner that is comfortable next to the skin, highly breathable and fast drying

  • Exceptionally high quality goose down with 800+ fill power

  • Half length YKK VISLON®zip that is angled away from the shoulder to prevent body contact whilst user is sleeping on side and allows easier access from inside

  • Fine microfleece facings and roll over Velcro closure flap at top of YKK zip for extra comfort

  • Two way YKK VISLON®zip for lower access or ventilation whilst zip is drawn up

  • Sleeping bag zip opens fully at bottom to completely open sleeping bag to aid airing and drying

  • Glow in the dark zip pulls for easier night time location without ²head torch

  • Two double 3-D volume baffles behind YKK zip that extend past zip end for draught proofing

  • Outer and inner anatomically designed shape tapers around lower legs and curves around shoulders to reduce cold spots

  • Bag has 3-D construction with side walls to allow comfortable sleeping on side

  • Trapezoidal vertical baffles across chest and around sleeping bag prevent cold spots and down migration to extremities of body

  • Horizontal baffles around lower legs and feet help hold the down in correct location

  • Flipper foot box shape begins in lower leg area and tapers from knees to ankles reducing the amount of cold spots

Neck Baffle
  • 3-D shaped neck baffle features Velcro at either end and is ergonomically shaped to encase the whole circumference of the neck

  • Split drawcord arrangement in baffle enables further adjustment and pulls insulation closer to front or rear of neck

  • Baffle can be split by Velcro and can fold down whilst in upright sitting position

Upper Bag
  • 3-D shaped hood design based on years of MONTANE®clothing construction experience, in particular the award-winning technical mountaineering jacket hood design

  • Hood shaping to prevent down migration and to limit cold spots

  • Peak visor on hood for improved weather resistance and prevention of weather entry into bag whilst bivvying. Peak helps stop condensation entering bag from inner tent or on contact with bivvy bag. Also helps shield light whilst sleeping in high Arctic / Antarctic summer conditions

  • Rear crown elastication reduces volume around hood, which increases thermal efficiency, decreasing the need to wear a hat; ideal for use whilst in sitting position. Elastication also helps hood to move with the head whilst sleeping

  • Split face drawcords to control and adjust volume individually around upper and lower face. Drawcords easily accessed from inside the sleeping bag

  • Soft brushed microfleece inner next to chin and mouth area

  • Lower face baffle and upper hood baffle arrangement is 3-D construction to ensure down volume around lower face drawcord area can loft easily

Further Features
  • Underside of sleeping bag features non-slip silicone MONTANE®roundels to help grip sleeping mat or bivvy bag

  • Foot box hang loops for storage and drying

  • Internal stretch mesh water bottle pocket on right hand side

  • Internal pocket on left hand side with concealed YKK zip for storage of MP3, mobile phone, GPS etc.

  • Includes MONTANE®cotton storage bag and dry bag

  • Dry bag doubles as a pillow whilst stuffed with clothing and features a non-slip silicone roundel for extra grip. Features a pull handle at base

  • Dry bag shape differs from traditional tub stuff sacs; constructed with a packable shape and to fit more easily in pack base compartments

    Technical Specs

    • Internal Length: 1,940mm / 76.3in

    • Construction: Trapezoidal boxwall with MONTANE® side baffles

    Temp Ratings

    • Comfort -12c

    • Comfort Limit -20c

    • Extreme Limit -42c


    • Fabric Denier: 30D x 30D Rip-stop

    • Lining: PEAQ Down

    • Filling: 885g / 31.2oz of minimum 90/10 goose down at 800+ fill (USA) CERTIFIED NON LIVE PLUCKED & NON FORCE FED DOWN

    PERTEX® Endurance Mini Rip-stop

    • 58g/m² 100% Polyamide mini rip-stop weave

    • Ultra thin moisture vapour permeable membrane

    • Highly water and wind resistant

    • Water resistant to a minimum of 1,000mm (JIS L 1092)

    • Breathable with an MVTR of 7,000g/m²/24hrs (JIS L 1099 A-1)

    • Spray rating 80 / 20 (JIS L 1092)

    PEAQ Down

    • 37g/m² ultra soft nylon plain weave

    • Exceptional comfort next to skin

    • Highly breathable and fast drying


    • Due to the many different technical components involved, MONTANE® does not recommend that you wash your Deep Heat sleeping bag.

    • MONTANE® recommends a professional cleaning service if in any doubt.

      • NEW ZEALAND DELIVERY (excluding boats).

        • For all NZ orders we use Post Haste Couriers
        • All local orders over NZD $100 are shipped free using a standard service
        • All local orders under NZD $100 are charged a flat fee of NZD $5 and ship using a standard service
        • Standard delivery time for South Island is next business Day. North Island is 2 business days. Rural Address and PO box numbers add 2 days.
        • Once your item has been dispatched you will receive an email with tracking information
        • Once it has left the store it is at the mercy of the couriers. Please check your tracking information and contact the couriers if it has not arrived when expected.


        • All Australian orders are charged a flat fee of NZD $10 and are shipped using a standard service (not including boats).
        • All North American orders are charged a flat fee of NZD $50 and are shipped using a standard service (not including boats).
        • Standard delivery times for international orders are 5 business days
        • Once your item has been dispatched you will receive an email with tracking information.
        • Please do not buy products with eggs or bacon, as international customs do not like this and your order may be confiscated at your own cost (no one wants wasted bacon and eggs!)


        • A limited number of Montane items are shipped from the UK warehouse and delivery can take up to 14 business days from order placement
        • All Ruffwear is shipped from our Christchurch store and usually leaves the same or next day. If for some reason we don't have the item you ordered we will notify you the day you order and let you know when you can expect delivery. Special order for non stocked items are usually 2 weeks.


        • Shipping can be arranged for boats, please contact the store for details.


        If you'd like to know availability and delivery times for a specific item please contact us and we will get back to you the same day.