Montane Prism Sleeping Bag

Highly technical PRIMALOFT® sleeping bag
1248g Weight (approx)
  • $325.00


Created for rough and tough conditions, the Prism sleeping bag was conceived for expeditions where high levels of moisture are expected, durability is needed and consistency of function is a pre-requisite, regardless of the sleeping conditions or what the sleeping bag has been through. PRIMALOFT® is highly resistant to moisture and will maintain much of its insulation even when wet, whilst the PERTEX® Microlight outer shell is windproof, fast drying and highly breathable. One of the most technical synthetic sleeping bags on the market, the Prism has a tailored anatomical form and top stitch panelling across the body to prevent PRIMALOFT® migration. 


Suitable for use in unpredictable conditions or where high levels of moisture are expected


Windproof and water repellent outer fabric

Synthetic insulation provides warmth even when wet

Fast drying and highly breathable

Anatomically designed shape

Draught proof YKK VISLON zip

Glow in the dark zip pulls

Unique engineered foot box

Non-slip silicone grips

Internal pockets for storage

Specially designed dry bag


  • Constructed from PERTEX® Microlight Mini Rip-stop that is lightweight, windproof, breathable and features a durable water repellency
  • PEAQ Synthetic lining that is comfortable next to the skin, highly breathable and fast drying
  • 160g PRIMALOFT® SILVER ECO that is lightweight, warm and dries remarkably quickly


  • Outer and inner anatomically designed shape tapers around lower legs and curves around shoulders
  • Side walls to upper part of body ensure there is insulation to shoulders and head area whilst sleeping on side
  • Top stitch lines across outer shell to fix PRIMALOFT® insulation in place and prevent synthetic migration


  • ¾ length YKK VISLON® zip that is angled away from the shoulder to prevent body contact whilst user is sleeping on side and to allow easier access from inside
  • Fine microfleece facings and roll over hook and loop closure flap at top of YKK zip for extra comfort
  • Two way YKK VISLON® zip enables lower access or ventilation whilst zip is drawn up and also allows sleeping bag to be opened out to aid airing and drying
  • Locking zip heads to avoid unexpected zip opening
  • Glow in the dark zip pulls for easier night time location without head torch
  • Single volume baffle behind YKK zip


  • Flipper shaped foot box in lower leg area tapering from knees to ankles which helps reduce cold spots.  Specifically tailored to cater for upright foot position


  • Neck baffle is specifically shaped to encase the whole circumference of the neck
  • Drawcord arrangement in baffle enables further adjustment and pulls insulation closer around the neck


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


  • 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 storage doubles as a pillow whilst stuffed with clothing and features a non-slip silicone roundel for extra grip.  Features pull handle on base
  • Dry bag shape differs from traditional tub stuff sacs; constructed with a packable shape and to fit more easily in packs









  • PERTEX® Microlight Mini Rip-stop
  • PEAQ Synthetic lining
Showing our 2 Montane Prism Sleeping Bag reviews with an average rating of Excellent. Would you like to write a review?
Review Summary - 5 out of 5 based on 2 ratings.
  • Overall Performance
  • Quality
  • Value for Money
  • Review Date - 24th March 2017
  • Product Reviewing? - Colour: BLACK, Size: ONE SIZE
  • Would you recommend this product? - Yes
  • Gender - Female

An excellent product that really does what it says on the tin!

March 24, 2017
  • Overall Performance
  • Quality
  • Value for Money
  • Review Date - 18th February 2017
  • Product Reviewing? - Colour: OLIVE, Size: ONE SIZE
  • Would you recommend this product? - Yes
  • Gender - Male

I love this sleeping bag. I own a down quilt but where I live (Scotland) it is rarely to experience dry weather for more than few days in a row. That's why I chose a synthetic bag. The bag is excellent - it's comfortable and warm. FWIW I am 6'2" and the bag is fine for me. However, I think anybody taller might find this bag a little short.

February 18, 2017
E. Bowman
Showing our 2 Montane Prism Sleeping Bag reviews with an average rating of Excellent. Would you like to write a review?