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Hike through snow to sleep in an alpine hut or camp out after a summer storm with confidence. The Sea to Summit Traverse TvII 25 sleeping bag won't let you down.

  • Features

    • Tapered rectangular shape offers more space and comfort than a traditional mummy bag
    • WaveLoft™ construction and high-quality THERMOLITE® insulation are lofty and durable for lasting warmth
    • Anatomically shaped footbox offers extra space
    • Oversize antisnag zip draft tubes and neck draft tube
    • Free-Flow half-zip right side, full-length zip left side and separate foot zips offer freedom of movement and increased ventilation
    • 30-denier nylon shell treated with durable water repellent (DWR) and 20-denier nylon lining are lightweight and compressible fabrics
    • Lining fabrics attached to shell prevents tangles
    • Includes strong 70-denier compression sack
    • This bag is designed to zip with another (second sleeping bag sold separately)


    Many sleeping bags are rated for temperature by an independent testing protocol. With both European Norm (EN) 13537 and International Organization for Standardization (ISO) 23537 testing, each bag gets a Comfort (or T-Comfort) rating and Lower Limit (or T-Limit) rating. The Comfort/T-Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit/T-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 hat, sleeping on a single 1 in. thick insulating pad. Many brands use the Comfort rating for women's bags and the Lower rating for men's and unisex bags. Everyone's body and sleep comfort differ, so EN and ISO ratings are simply a guideline to help you compare products.
    View all Sea to Summit Men's Sleeping Bags
  • Technical Specs

    Best Use


    Tested Lower Limit

    25 degrees (F) - EN

    Tested Comfort

    35 degrees (F) - EN

    Temperature Rating (F)

    25 degrees (F)

    Temperature Rating (C)

    -4 degrees (C)


    30-denier nylon

    Zipper Location


    Insulation Type



    THERMOLITE synthetic fibers


    20-denier nylon

    Sleeping Bag Shape


    Stuff Sack Size


    Stuff Sack Volume


    Compressed Volume




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