Sea to Summit Trailhead ThIII 20 Sleeping Bag

Features

• Tapered rectangular shape offers more space and comfort than a traditional mummy bag
• Full-length #5 YKK zip allows bag to open out flat and be used as a quilt
• Second zip slider in footbox offers versatile ventilation
• WaveLoft™ construction creates extra warmth and loft
• Lining fabric attached to shell prevents tangles
• Oversize zip draft tubes feature antisnag material
• 30-denier nylon shell treated with durable water repellent (DWR) and 20-denier nylon lining are lightweight and compressible fabrics
• Includes stuff sack
• Note: This bag is not designed to zip with another

Imported.

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 Sea to Summit Backpacking Sleeping Bags

Technical Specs

Best Use

Tested Lower Limit

Tested Comfort

Temperature Rating (F)

Temperature Rating (C)

Weight

Shell

Zipper Location

Insulation Type

Fill

Lining

Sleeping Bag Shape

Fits Up To (in.)

Shoulder Girth (in.)

Hip Girth (in.)

Stuff Sack Size

Stuff Sack Volume

Compressed Volume

Gender

Backpacking

20 degrees (F) – EN

31 degrees (F) – EN

20 degrees (F)

-7 degrees (C)

Regular: 3 lbs. 1 oz. Long: 3 lbs. 5 oz.

30-denier nylon

Left

Synthetic

Synthetic

20-denier nylon

Semirectangular

Regular: 72 inches Long: 76 inches

Regular: 60 inches Long: 64 inches

Regular: 57 inches Long: 62 inches

Unavailable

Unavailable

Unavailable

Unisex