Sierra Designs Night Cap 35 Synthetic Sleeping Bag

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The Night Cap is based on the hugely popular Cloud with the same innovative zipless opening with oversized comforter really works especially for people who move around during the night, people looking for extra room and quick temperature control.

Sierra Designs says

Based on our bestselling Cloud, but now in a lower cost, fully recycled synthetic package, the Night Cap features a zipperless design with an integrated comforter for all the comforts of home in the backcountry. The Night Cap also incorporates our patented self-sealing foot vent and a pad sleeve, allowing increased ventilation for hot sleepers and movability for wiggle worms, side, and stomach sleepers.

Our Verdict

Sierra Design’s Night Cap is the synthetic fill version of the unique Cloud 800 sleeping bag. There are a number of practical features that you only truly appreciate once you’re using the bag. The zipless, quilt style opening that wraps around you seems like a gimmick until you get to enjoy how easily you can get in and out of it. The opening has an oversized comforter which acts like a quilt so you can really wrap yourself up in it if the temperatures drop. Alternatively you can quickly and easily open it up to dump heat if you’re too hot.

Sierra Designs use something called ‘Temperature Mapping’ in this sleeping bag. This is when they use less insulation on the back of the sleeping bag and add sleeves to attach your sleeping mat in place. This may seam strange but by keeping your mat securely in place it will keep you just as comfortable and warm, replacing the unnecessary bottom insulation, thus saving you weight. The best aspect of the bag for me personally is the self sealing foot vent. I get hot feet so restrictive mummy bags are often uncomfortable due to feet that are overheating. On the Cloud you can easily slide your feet out of the vent on the bottom to cool off or just let air in. Due to the placement of the vent and the overlapping materials, as soon as your feet are inside there no chance of cold air getting in or your feet accidentally getting out. An ingenious design feature.

This version has 558g of SierraLoft Eco Synthetic Insulation that has a -1.6°C Comfort Limit so its good for two to three season use, particularly if you’re a warm sleeper. The fabrics used are 20D so they are lightweight but also more durable than many of the lightest bags out there. The dimensions of the bag are generous so it would suit someone after a larger bag, someone who moves around a lot at night and warm sleepers. The overall weight is really impressive given all the features too.

– Reviewed by Ultralight Outdoor Gear

Features

• Patent pending zipperless design for the ultimate comfort
• Oversized integrated comforter gives you all the comforts of your bed at home
• Insulated shoulder pockets keep comforter wrapped around you and seals out drafts
• Patented self-sealing foot vent provides fast and easy ventilation
• Temperature Mapping System – This sleeping bag features a sleeping pad sleeve that keeps pad under you, for comfort and warmth and replaces unnecessary bottom insulation
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• Hood cinch to keep in heat when the temps drop
• Recycled materials reduce environmental impact
• ISO tested
• Stuff sack included for easy pack up and transport

Specifications

Temperature Rating

• Temperature Rating: 35°F / 1.67°C
• ISO Comfort Rating: 39°F / 2.22°C
• ISO Limit Rating: 29°F / -1.67°C

Regular Specs

• Weight: 1068g (excludes storage bags)
• Fill Weight: 24 oz /680.39 g
• Fits Up To: 72 in / 183 cm
• Length: 78 in / 198 cm
• Shoulder Circumference: 60 in / 152 cm
• Hip Circumference: 58 in / 147 cm
• Footbox Circumference: 40 in / 102 cm
• Stuff Sack Size (L x W): 7.5 x 15″ / 19 x 38cm

Long Specs

• Weight: 1164g (excludes storage bags)
• Fill Weight: 26 oz / 737.09 g
• Fits Up To: 78 in / 198 cm
• Length: 84 in / 213 cm
• Shoulder Circumference: 62 in / 157 cm
• Hip Circumference: 60 in / 152 cm
• Footbox Circumference: 42 in / 107 cm
• Stuff Sack Size (L x W): 7.5 x 15″ / 19 x 38cm

Materials

• Insulation: SierraLoft Eco Synthetic Insulation
• Shell Fabric: 20d Recycled Nylon Ripstop
• Liner Fabric: 20d Recycled Nylon Taffeta

Help and advice:

• The Ultimate Guide to Lightweight Sleeping Bags
• Time-Saver Guide to Choosing a Sleeping Bag
• The EN13537 Standard
• Sleeping Bag Shapes & Sizes
• Sleeping Bag Features 1
• Sleeping Bag Features 2
• Recycled Content in Outdoor Gear