Rab Neutrino Pro 500 Sleeping Bag

$470.00to $490.00
Color: Gray
please select a Size
Shipping restrictions may apply.

Featuring highly wind- and water-resistant Pertex® Quantum Pro outer fabric, the adaptable Rab Neutrino Pro 500 sleeping bag is perfect for spring and summer adventures with stormy weather.


  • Shell fabric is 40 g, 20-denier Pertex Quantum Pro recycled ripstop nylon with a fluorocarbon-free durable water repellent (DWR) finish
  • Lined with 38 g, 20-denier recycled nylon
  • 800-fill-power European goose down with Nikwax fluorocarbon-free hydrophobic finish
  • Down is RDS-certified
  • Weight-saving chevron baffle design reduces down migration and optimizes core warmth
  • Trapezoidal box wall construction with differential cut helps to maximize loft and warmth
  • Adjustable neck baffle provides a close fit for decreased heat loss
  • Adjustable hood closure system features an elasticized drawcord and cord lock
  • YKK 3/4-length main zipper has a synthetic-filled baffle to trap warmth
  • Angled foot box allows for a relaxed sleeping posture


Many sleeping bags are rated for temperature by an independent testing protocol. REI and the broader industry now use the International Organization for Standardization (ISO) 23537 protocol, which improves on the older European Norm (EN) 13537 standard; you may still see older items in our assortment that were only EN tested. With either protocol, each bag gets a Comfort (or T-Comfort) rating and Lower Limit (or T-Limit) rating. The Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Ratings are based on a person wearing one long underwear layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38. Many brands use the Comfort rating for women's bags and the Lower Limit rating for men's and unisex bags. Everyone's body and sleep comfort differ, and conditions of use (posture, clothing, sleeping pad R-value, wind, humidity, etc.) affect total insulation, so EN and ISO ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth.
View all Rab Backpacking Sleeping Bags

Technical Specs

Best Use


Tested Lower Limit

21 degrees (F) - ISO

Tested Comfort

32 degrees (F) - ISO

Temperature Rating (F)

21 degrees (F)

Temperature Rating (C)

-6.1 degrees (C)


Regular - Left Zip: 2 lbs. 0.3 oz.

Long - Left Zip: 2 lbs. 3.4 oz.



Zipper Location


Insulation Type


Water-Resistant Down



800-fill-power goose down

Fill Weight

500 grams



Sleeping Bag Shape


Fits Up To (in.)

Regular - Left Zip: 74.8 inches

Long - Left Zip: 78.8 inches

Shoulder Girth (in.)

Regular - Left Zip: 63 inches

Long - Left Zip: 63.8 inches

Hip Girth (in.)

Regular - Left Zip: 52.8 inches

Long - Left Zip: 53.5 inches

Stuff Sack Size

9 x 13.8 inches




Contains recycled materials

Down certified to the Responsible Down Standard (RDS)

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