Sierra Designs Nitro 800F 35 Regular is a lightweight down sleeping bag with a cocoon design for the off-season.
The Nitro 800F 35 Regular size is designed for users of average build up to 183 cm tall.
The patented ventilation system in the bottom of the sleeping bag allows you to easily stretch your legs for better thermoregulation.
Insulation - natural duck down DriDown™ with a moisture-repellent finish, the sleeping bag retains its temperature well even when wet.
DriDown™ technology - the down is treated with a polymer at the molecular level to create a hydrophobic coating on each individual fluff, which allows DriDown down to stay dry 10 times longer than usual and dry 33% faster. When wet or exposed to moisture, DriDown down retains 2.7 times its normal volume and continues to keep you warm in any situation.
The outer fabric and lining are made of tear-resistant RipStop nylon.
The Sierra Designs Nitro 800F 35 is intended for hiking, mountain tourism and mountaineering.
Season:  late spring, summer, early autumn.

Description of the Sierra Designs Nitro 800F 35 Regular sleeping bag:
- Maximum weight, kg:   0.61 (21.5 oz)
- Minimum comfortable temperature, °C:    - 3 (27 °F)
- Maximum comfortable temperature, °C:    + 3 (37 °F)
- Internal length, cm:   198 (78.0 in)
- Internal width (shoulders/hips/foot), cm:   78.5 / 71.0 / 51.0 (31.0 / 28.0 / 20.0 in)
- Package size, cm:   ∅ 33.0 х 18.0 (13.0 x 7.1 in), 30% smaller when compressed
- Exterior Material:   Nylon 15D Ripstop with DWR impregnation free of PFC (perfluorinated compounds)
- Filling:   255 g (9.0 oz) - 800 FP DriDown™ duck down, PFC-free, RDS certified (responsible down standard)
- Inner material:   Nylon 15D Ripstop with DWR impregnation free of PFC (perfluorinated compounds)
- Same level of insulation throughout the sleeping bag
- Quilted construction that prevents the down from fluffing up
- Patented ventilation system at the bottom of the sleeping bag for better thermoregulation
- Two-way zip with anti-jamming function
- Wide collar prevents cold air from entering
- Anatomical adjustable hood
- Bag with drawstring for transport
- Mesh storage bag

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.