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Criterion Quantum 200

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Criterion Quantum 200

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Availability: In stock.

Regular Price: £ 285.00

Special Price: £ 245.00

Quick Overview

Lightweight 2 seasons use sleeping bag. Easilly our best-selling sleeping bag. Ideal for use when lightweight backpacking, trekking, on summer Alpine trips, adventure racing or on mountain marathons

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Regular Price: £ 285.00

Special Price: £ 245.00

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Product Description

Colour : Black / Silver
Fabric : Pertex Ripstop Quantum, 34g/m², DWR treated
Filling : 200g of White Polish goose down, Diamond grade 96:4
Fill power : 870+ US
Tested and certified by the International Down & Feather Testing Laboratory, Salt Lake City
Comfort temperature : 0°C
Tested by : Leeds University Performance Clothing Research Group to BS4745, ISO 5087-1
Average weight of sleeping bag : 530g.
Stuff sack size : 11 x 11 x 25cms, weight 14g
Total length : 217cm
User height : up to 185cm.
Shoulder width : 75cm
Foot width : 50cm
Construction : Quantum 200 - boxwall top, base is boxwall
Differential fill and differential cut with more filling in the top where the warmth is needed
Box foot - trapezium shape, comfortable for all feet positions
Cowl hood with elasticated, one hand operated drawcord
Insulated neck warmer - a simplified type of neck baffle
Full length, two-way YKK zip plus velcro fastener
Left and right handed zip models available, which can be zipped together if required
Anti-snag, full length zip baffle, down-filled to prevent cold spotsInside pocket and hanging loops
Supplied with compact, fully-featured stuff sack and breathable, mesh storage bag
Boxwall construction
The only single-layer constructions which do not create cold spots along seams are the "V", "trapezoid" and "boxwall" designs. The baffles in each of these designs do have sidewalls to keep the insulation in place. There are no "lines of cold" as a uniform thickness of insulation is present throughout the sleeping bag. The simplest is the boxwall design. The baffle sidewalls are vertical, hence the baffle shape is box-like.
On the top side the trapezoid construction gives better performance than boxwall.
In the sleeping bag base, however, the insulation value of the down is much reduced because it is compacted by the weight of your body preventing loft. The effect of this compaction far exceeds any disadvantage from using a boxwall construction rather than trapezoid. Furthermore, your body weight prevents displacement of the down - which is another reason why trapezoidal is unnecessary for the base.
Boxwall is lighter than trapezoid, which makes it a better option for the base.
Differential Fill
Differential Fill means that the quantity of down in the base is less than the quantity in the top of the sleeping bag. At Criterion they employ a ratio of top:base = 3:2 (discounting the hood, neck and zip baffles). Hence the base has 40% of the total insulation instead of the 50% it would have if there was no Differential Fill. The compaction of the base restricts loft and reduces its insulation value so the difference in warmth between 40% and 50% is quite insignificant. On the other hand, having 60% in the top gives a big warmth benefit compared with having 50%, since no compaction means that the extra down traps a fully proportionate extra quantity of air and loft is increased by a fifth

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