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The MONT Spindrift XT 850 is purpose-built for severe winter and polar environments. Rated to -19°C, this sleeping bag delivers reliable thermal performance across Standard, Women's, and XL configurations. Engineered for severe Scottish winters, backcountry expeditions, high-altitude mountaineering, and polar ventures, it combines technical insulation with the robustness required for extreme conditions where performance margins are non-negotiable.
Comfort Temperature Rating for warm sleepers: -19°C, cold sleepers: -13°C. These ratings suggest the average user will be comfortable at or around those temperatures. These temperature ratings assume you're using an appropriately insulated sleeping mat, you are well hydrated, well fed and dry.
HYDRONAUTE XT SHELL: Comfort in the Extreme: Using advanced monolithic PU membrane technology, Hydronaute XT fabric is completely waterproof, totally windproof & highly breathable. Guaranteed to maintain greater warmth & comfort than coated fabrics, Hydronaute XT is the best protection for down sleeping bags & clothing in cold to extreme conditions. Waterproof to 20,000mm, highly breathable 48,000g/m2/24hrs: If not removed promptly, water vapour from your body will gather on the down & reduce its ability to trap warmth. Hydronaute XT fabric expels 20L of water vapour per square metre per 24 hours for drier down, greater loft & maximum warmth. Warmth Sealed In: With a 100% windproof rating, even Arctic blasts will not penetrate Hydronaute XT fabric, keeping warm air trapped inside.
RADIAL ARC BAFFLE: The Radial Arc Baffle System is a significant design innovation that improves the thermal efficiency of a Mont sleeping bag. Radial Arc baffles curve naturally around your body rather than compressing the down around your body.
When a down baffle (chamber) is bent, ripples in the fabric occur, which will create cold spots and compress down. The radial Arc Baffle System reduces distortion and increases warmth and loft
CORDLESS COLLAR SYSTEM: A cordless Collar System provides superior insulation around your shoulders and neck without the need for uncomfortable and fiddly draw cords. The Cordless Collar can be wrapped snugly around your neck and shoulders, or in warmer conditions, can be secured inside the sleeping bag to increase ventilation. The Cordless Collar is a unique Mont design and can be found on Brindabella, Spindrift and Expedition 8000 sleeping bags.
TUCK STITCHING: Tuck stitching is a construction method that conceals the stitch inside the sleeping bag, thereby protecting it from abrasion and snagging. This is in comparison to top-stitched seams, where each stitch is exposed, which is commonly found in other sleeping bag brands. Tuck-stitched seams are also more water-resistant than top-stitched seams, again because the seam is concealed internally. Tuck stitching attaches the lock-knit baffle to a small fold in the shell material.
TOASTER POCKET: is for slow-release, air-activated heat packs: your toes and feet will never be cold again.
More Help? For further assistance on choosing your down sleeping bag, we have an article explaining fill power, the pros and cons of down over synthetic insulation and more info on caring for your bag available to view here: A Guide to Down Sleeping Bags.
Features
Specification
Would you like to try on some climbing shoes, running shoes or mountain boots for size before you make your purchase? If so, then why not visit our showroom or book a one-on-one appointment with one of our experienced staff members.
Would you like to try on some climbing shoes, running shoes or mountain boots for size before you make your purchase? If so, then why not visit our showroom or book a one-on-one appointment with one of our experienced staff members.
