Sierra Designs Synthesis 20 Long is a modern sleeping bag with an anatomical cocoon design for the off-season.
The size of the Synthesis 20 Long is designed for users of average build up to 198 cm tall.
SierraLoft™ Synthetic insulation is a premium insulation that provides high levels of warmth even when wet
Durable outer fabric and comfortable inner fabric guarantee durability and a pleasant stay.
Patented self-sealing leg vents for quick and easy ventilation.
Zips on both sides provide maximum comfort during use.
Purpose of Sierra Designs Synthesis 20 Long: for hiking, alpine tourism and mountaineering.
Season: spring, autumn.

Description of the Sierra Designs Synthesis 20 Long sleeping bag:
- Max weight, kg:  1,25 (44.1 oz)
- Min comfort temperature, °C:    - 6 (21 F)
- Max comfort temperature, °C:     0 (32 F)
- Internal length, cm:   208.0 (82.0 in)
- Inside circumference (shoulders/hips/foot), cm:   81.5 / 73.5 / 53.5 (32.0 / 28.0 / 21.0 in)
- Package size, cm:   ∅ 19.0 x 38.0 (7.5 x 15.0 in), 30% smaller in the compression state
- Outer material:   Nylon 20D Ripstop with water-repellent coating (DWR)
- Filling:   886 g (31.3 oz) SierraLoft™ Synthetic - premium synthetic insulation
- Inner material:   Nylon 20D Taffeta
- Patented self-sealing leg vent
- Double zip with anti-jamming protection
- Special insulation strip along the zip
- Flap to protect the zip from unzipping
- Adjustable hood
- Bag with tie-down for transport

Recommendations for use
- The sleeping bag is designed to be used with a sleeping pad - a camping mat that insulates the body from the cold ground.
- Fold the sleeping bag into the transport bag randomly each time - this will prevent the insulation from falling off and extend its service life.
- It is recommended that you wash your sleeping bag as little as possible, following the manufacturer's recommendations and using appropriate detergents, and using a liner will help you wash your sleeping bag less often.
- It is recommended to dry the sleeping bag whenever possible in the field, and be sure to dry and ventilate it well before storing it for a long time.
- Store the sleeping bag in the most fluffy, non-compressed state - this will extend the service life of the insulation, and it is even better to store the sleeping bag in a special mesh bag.
Warranty
The warranty period is 1 year.
If a branded product fails due to a manufacturing defect, we will repair or replace it free of charge at our discretion.
This warranty applies only to original, unaltered and unmodified products and workmanship.
This warranty does not cover damage caused by accident, improper care, negligence, normal wear and tear, weather conditions (wind, rain, fire, animals, etc.) or natural fading of colours and materials.
This warranty does not cover consequential damages or any other damages resulting from any defect in the product.
Damage not covered by the warranty may be repaired at a reasonable charge.
Manufacturer
Sierra Designs was founded in 1965 by two friends, Bob Swanson and George Marks, who hiked and sailed together, and the company's name was chosen in honour of their favourite holiday destination in California - the Sierra Nevada Mountains.
Production began with the hiring of two seamstresses, assisted by George's mother, who was a great craftswoman. Together with his mother, George invented and created original sleeping bags for that time. They designed and manufactured a whole line of tents, sleeping bags, clothing and accessories from scratch, which were successfully sold to stores and dealers.
An innovative product made the company recognisable - the Mountain Parka 60/40 jacket, which entered the market in 1968, became a hit and has been very popular for a long time.
For a long time, the leader among tents was the classic Sierra Designs Glacier expedition model, and the highlight among sleeping bags was the Double Mummy.
In 1978, they released their first dome tent, the Octadome.
In 1982, Sierra Designs launched the Domicile, Sphinx and Flashlight tents with a new pitching system, which were the first models in the world to feature plastic clips for the arches.
In 1984, to reduce costs, Sierra Designs management decided to move its garment production to Asia and Latin America.
In the mid-90s, Sierra Designs acquired the American Recreation Products holding.
Today, the brand is owned by another large group of companies, Exxel Outdoors, under whose leadership Sierra Designs is actively trying to revive its former glory and push other successful manufacturers of ultralight equipment on store shelves.