New Riff 15F Down Sleeping Bag Down Sleeping Bags

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Nemo’s Riff 15F provides much-needed space for restless sleepers without adding weight. The premium down and ventilation system ensures warmth and comfort. The durable construction and packability make it an excellent choice for ultralight backpacking.

Nemo says: 

A pinnacle-performance 3-season 800 FP down bag, Riff offers a trim, athletic cut designed for side sleepers who crave space-saving packability. NEMO’s iconic Spoon™ bags are cut wider at the elbows and knees so campers can easily shift positions throughout the night, and the Ultralight Spoon silhouette used on Riff maintains that extra room while cutting in tighter at the feet and shoulders. The result is a sleeping bag vastly more comfortable than a mummy bag, but still impressively compact.

Our Verdict

Nemo’s Riff 15F provides a luxuriously roomy haven in an ultralight package for ounce-counting backpackers who toss and turn at night. The key is Nemo’s Ultralight Spoon shape, with extra space around the elbows and knees to allow side sleepers to shift positions freely. Despite the generous interior, the streamlined design keeps weight and packed size impressively trim.

At its core is premium 800-fill hydrophobic down, which provides reliable warmth to the 15°F rating. Nemo’s ThermoGill vent system offers extra ventilation through staggered zippers without compromising warmth. The plush Blanket Fold draft collar seals in heat around your shoulders.

Other highlights include a waterproof/breathable foot box, ultra-durable 20D recycled fabrics with PFC-free DWR, and anti-snag zipper tracks. Weighing under 2 lbs for the regular size, it’s an ultralight option for cold-weather adventures.

Perfect for active side sleepers, the Riff 15F delivers Nemo’s legendary sleep comfort in a highly packable, premium, down-filled package. It is an excellent investment for ounce-counters who want to maintain quality sleep on high-mileage backpacking trips.

– Reviewed by Ultralight Outdoor Gear

Features

• Ultralight Spoon™ Shape – Adds room at the elbows and knees for side sleepers while maintaining a tailored silhouette for space-saving packability
• 800 FP Down Insulation – Premium RDS-certified down is treated with a PFAS-free, hydrophobic coating and provides excellent warmth, weight, and packability.
• Thermo Gill™ Vents – Featuring an interior and exterior zipper with a draft-blocking intermediate layer, each vent incrementally releases body heat without direct exposure to the cold.
  
• Blanket Fold™ Draft Collar – Updated, larger design dramatically blocks cold air or releases excess warmth and creates a cozy, tucked-in feel.
  
• Shape – Ultralight Spoon™A top-of-the-line, backountry-oriented silhouette. Trim and athletic for ounce and space-saving packability while still allowing for side-sleeping comfort.
  

Specifications

ISO Comfort:  28F / -2C 

ISO Limit: 17F / -8C

Regular:

• Weight: 1126g
• Fill Weigh: 540g 
• Fits up to: 6′ / 183 cm
  
• Shoulder Girth: 60 in / 152 cm
• Hip Girt: 53 in / 135 cm
• Knee Girt:  57 in / 145 cm
• Compressed Volume: 6.2 L

Long:

• Weight: 1204g
• Fill Weigh: 593g 
• Fits up to: 6’6″ / 198 cm
  
• Shoulder Girth: 62 in / 157 cm
• Hip Girt: 54 in / 137 cm
• Knee Girt:  59 in / 150 cm
• Compressed Volume: 7.1 L

Material & Construction

• Temp – 15ºF / -9ºC
  
• Fill – RDS-certified 800 FP down w/ PFAS-free DWR
• Shell – 100% post-consumer recycled polyester ripstop w/ PFAS-free DWR
• Lining – 100% post-consumer recycled polyester ripstop w/ PFAS-free DWR
• Hood & Footbox – 100% recycled waterproof/breathable polyester w/ PFAS-free DWR

Help & advice:

• The Ultimate Guide to Lightweight Sleeping Bags
• Time-Saver Guide to Choosing a Sleeping Bag
• Nemo Sleeping Bag Guide
• Recycled Content in Outdoor Gear
• Why is ‘PFC Free’ Important?
• Down Quality
• All About Down
• Hydrophobic Down
• Responsible Down Standard
• Ethical Down