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What is the Alpine 400?
Lighter than the Alpine 600, this is a premium duck down sleeping bag with a slim-fitting shape and adapted to women's measurements for ultimate comfort and warmth. The Alpine 400 is technically constructed to optimise heat regulation to support you when camping out in colder weather.
What is it made of?
Insulation: This sleeping bag uses 650 fill power, R.D.S Certified, European Duck Down for maximum loft (fluffiness) and insulation.
European Duck Down is fantastic quality down, it has smaller clusters than Goose Down, slightly reducing the warmth to weight ratio. However, this doesn't mean that the Alpine 400 is of lesser quality than other Rab sleeping bags.
The down is treated with a Nikwax fluorocarbon-free Hydrophobic finish, which adds light water-resistance to the down itself.
Can't quite catch the lingo? Here's a quick breakdown.
Fill power - Fill power measures the warmth and efficiency of the down, alongside its ability to loft (fluff up). A rating of 650 fill power means that 1oz of this down, fills 650 cubic inches of space when fully lofted.
R.D.S - The Responsible Down Standard ensures that the down is sourced from happy birds who haven't been plucked and have been well cared for.
Hydrophobic - Hydrophobic down dries out and lofts more quickly than untreated down, resisting moisture from sweat and condensation that may build up when you're catching z's in the bag. Fluorocarbon-free Hydrophobic finishes don't use harmful chemicals that cause damage to the environment, an excellent feature for more eco-conscious adventurers.
Outer fabric: The outer shell of this sleeping bag is made with 20D Pertex® Quantum Nylon Ripstop with a fluorocarbon-free DWR (durable water repellent). The tightly woven construction of this material helps prevent tears and snags whilst maximising the thermal efficiency of the insulation and helping down to fully loft. Pertex® Quantum is soft to the touch, whilst being fully windproof to retain warmth.
The material thrives in cold, damp environments due to its ultra-thin, water-resistant DWR coating, protecting from light moisture alongside wind and cold temperatures.
Lining: The Alpine 400 is lined with 20D Recycled Nylon, which provides a lightweight, breathable inner that still feels soft and cosy on the skin.
What are its features?
This sleeping bag uses a technical trapezoidal boxwall construction that directs more insulation towards the body's surface by forcing the down inside each baffle to sit in a trapezoid shape. This construction method enhances the design to optimise the loft and warmth of the bag.
There is also a weight saving chevron-shaped baffle design on the upper torso area. Chevron shaped baffles help reduce movement of the down and maximise core warmth by encouraging the down to sit centrally.
A 3D shaped neck collar helps you keep cosy and trap heat inside the sleeping bag. The collar is filled with down to keep the neck and shoulders warmer whilst blocking any gaps that could let the cold air in.
The sleeping bag is fastened with a YKK® 3/4 length main zip on the left side, with a down-filled baffle running along the side to prevent a cold spot at the entry. There's also a handy zippered internal stash pocket, perfect for storing your phone, a torch, or an alarm clock.
This product comes in a tapered mummy shape, known as the slim fit of sleeping bags. The tapered shape surrounds the figure comfortably and prevents cold gaps or heat loss from excess space, making them the most thermally efficient style of sleeping bag. The angled foot box allows a natural, relaxed sleeping posture by providing extra wiggle room around the feet, ideal for fidgety sleepers!
Two storage bags are included with this sleeping bag. The zipped cotton sack is designed to store your sleeping bag at home and give it more breathing room. Storing the bag in a more spacious pack allows the down filling to remain lofted, helping to increase its overall performance and lifespan.
A small drawcord stuffsack is also provided to compact the bag and carry it on the move with less bulk. Stuffsacks are meant to be stuffed! So do your best to cram your sleeping bag inside instead of folding the bag when putting away. Stuffing randomly helps to prevent folds and creases in the down, which will prevent cold spots and gaps from developing.
Features:
- Rab Sleep Limit: -5°C (25°F)
- ISO EN: Comfort: -1°C (30°F), Limit: -7°C (19°F), Extreme: -25°C (-13°F)
- 20D Pertex® Quantum nylon ripstop (36gsm) with fluorocarbon-free DWR
- Lining: 20D Recycled Nylon (38gsm)
- 650FP European Duck Down with Nikwax Fluorocarbon-Free Hydrophobic Finish
- Weight saving chevron baffle design on the upper torso, reduces down migration and optimises core warmth.
- Trapezoidal boxwall construction with differential cut, to maximise loft and warmth
- YKK® zipped internal stash pocket
- 3-dimensional shaped down-filled neck collar to seal in warmth
- YKK® 3/4 length main zip with down-filled baffle to trap warmth
- Main zip is on the left side
- YKK® Anti-snag zip insert and anti-snag internal zip guard
- Angled foot box for relaxed sleeping posture
- Zipped cotton sack with water-resistant base for home storage
- Drawcord stuffsack included
- Hand-filled in Derbyshire UK
- Outer: 100% polyamide. Lining: 100% recycled polyamide
- Tapered Mummy Shape
- Women's specific measurements