Sea to Summit Trek TkI 30 Sleeping Bag

Features

• 650+ loft Ultra-Dry Down™; down is certified to the Responsible Down Standard (RDS)
• Full-length YKK #5 main side and foot zippers provide superior ventilation and allow the bag to be used as a comforter
• Shaped hood and oversize zipper draft tubes seal in warmth and keep cold out
• Internal pocket is ideal for a phone, GPS device or other valuables
• Includes a lightweight Ultra-Sil™ compression bag and storage cell
• Forms a snug double sleeping bag by zipping to any Altitude, Journey or Venture sleeping bag (not included)
• Sea to Summit guarantee is offered for the lifetime of this product; see manufacturer’s website for details

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

Water-Resistant Down

Fill

Fill Weight

Lining

Sleeping Bag Shape

Fits Up To (in.)

Shoulder Girth (in.)

Hip Girth (in.)

Stuff Sack Size

Stuff Sack Volume

Compressed Volume

Gender

Sustainability

Backpacking

30 degrees (F) – ISO

40 degrees (F) – ISO

30 degrees (F)

-1 degrees (C)

Regular Wide: 2 lbs. 0.5 oz.

30-denier nylon

Left

Down

Yes

650-fill-power Ultra-Dry premium down

Regular Wide: 15.9 ounces

30-denier nylon

Semirectangular

Regular Wide: 72 inches

Regular Wide: 68 inches

Regular Wide: 63 inches

Regular Wide: 7.1 x 9.4 inches

Regular Wide: 10 liters

Regular Wide: 3.3 liters

Unisex

Down certified to the Responsible Down Standard (RDS)