The SirJoseph mummy sleeping bag Erratic Plus III 850 - 200 cm - left - Dark Grey is the updated sleeping bag from the Alpine series is a good sleeping bag for a trek under Everest or a climb of Island Peak or Mera Peak. The sleeping bag offers you wind and water protection and perfect thermal insulation.

These down sleeping bags offer you perfect support for mid-mountain expeditions. The sleeping bags are designed with an emphasis on minimum pack volume, maximum thermal comfort and protection against rain, snow, frost and wind. Designed for the extreme conditions of the alpine mountains, the new Erratic Plus III 850 sleeping bag offers protection against bad weather. It allows you to sleep under the stars. The new Alpha chamber construction and a specially developed close-fitting hood shape provide even better insulation.

Below are the specifications of the SirJoseph Erratic Plus III 850 mummy sleeping bag:

• New with Alpha chamber design
• Mummy shape perfectly mimics the human figure
• Closed chambers prevent shifting springs in the sleeping bag
• Closed construction enables washing and easy maintenance
• The specially developed new hood shape protects head and face from the cold
• Left and right zip with closing option
• The double-sided zip allows the sleeping bag to be opened from the top and bottom
• The 3D collar separates the head area from the body area
• Small pocket for small items in the sleeping bag
• Self-locking clips allow adjustment of the collar and hood pull with one hand
• The special strip on which the zips are lined prevents heat loss through the zip, but more importantly prevents the zip from getting caught in the fabric
• The 3D dual-chamber bottom increases thermal comfort in the leg area and reduces the risk of frostbite
• New floor shape "Alpha foot box" - an angled trapezoid shape that mimics the shape of the foot
• Free leg room when sleeping on the back for extra comfort
• Compression pocket reduces volume by up to 30%
• Storage bag and waterproof compression bag included
• 650 cuin / oz EU standard
• Outer material: Excel Dry Light 100
• Inner fabric: Softex 20D DWR
• Filling: goose feathers
• Loading weight 880 grams of feathers
• Goose feathers 90/10 EU
• Suitable for a person up to 200 cm
• Shoulder 84 cm, Hip 77 cm, Foot 31 cm
• 1580 grams
• In compression bag 32 x 23 cm

For the outside of the sleeping bag Excel Dry Light 100 (nylon with PU lamination) has been used. the efficient membrane keeps moisture from the outside and moisture from the inside coming from the body does drain to the outside. The ripstop structure is abrasion-resistant and increases protection against tearing. Due to its absolute windproofness, there is no thermal leakage and therefore products made of this material are 5 degrees warmer than products made of normal fabrics. Waterproofing 10,000 mm H20, water resistance DWR, 18,000 g/m2/24h breathability with a weight of 49g/m2 and windproofing 100%.

On the inside of the sleeping bag, Softex 20D DWR (100% polyester) has been used. Again, a fabric specifically for this type of extreme sleeping bag where the DWR further enhances water resistance. Breathability and windproofness of 90%, weight of 55 g/m2, water resistant 350 mm H2O DWR

The goose down used with a fullness of 650 cuin / oz (measured according to a European standard) is of exclusively European origin. The emphasis here is on maximum warmth, loft and minimum weight. The goose down with the best properties, with the highest dust particle ratio. The feathers are veterinary tested and all parameters mentioned are based on the international IDFB (International Down and Feather Bureau) protocol. Goose down is 100% natural, 100% recyclable and easily biodegradable.

Also available to order in inner sizes 170/190/200 cm.

Extreme tested: -30°C / Low Comfort: -13.2°C / High Comfort: -7°C

Below is an explanation of these temperatures:

Extreme -30 ° C

The lower limit, most extreme temperature. This is where danger of health damage through hypothermia occurs, this applies to a normal woman and under normal conditions. This temperature indicates the danger that can lead to death.

Limit -13.2°C

The lower limit, here the user is in a squatting body position, and generally in thermal balance and does not feel cold, this applies to a normal man and under normal conditions.

Comfort -7°C

The lower limit of the comfort range where the user of the sleeping bag in a relaxed body position, for example in the supine position, is generally in thermal balance and does not feel cold, relative to a normal woman at normal conditions.

The sleeping bag comes with a compression bag. The recommended body length for this sleeping bag is 200 cm.

Also watch the video to get a good look at the sleeping bag.