Sea to Summit Ultra Sil Compression Sack

$33.95 to $45.95
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Trim the weight—and the bulk—of your load with this incredibly light, tough compression sack from Sea To Summit.

  • Features

    • Thirty-denier diamond ripstop Cordura® fabric is siliconized for water resistance and offers a smooth finish for easy packing
    • Four extra-long straps provide even compression and allow sack to be used to maximum capacity
    • Flip-top lid prevents tangled straps; pull handle on bottom aids in unpacking
    • Quality construction and durable, bar-tacked reinforced stress points hold up to years of heavy use


    View all Sea to Summit Compression Sacks
  • Technical Specs

    Best Use


    Gear Capacity (L)

    6 L: 6 liter

    10 L: 10 liter

    14 L: 14 liter

    20 L: 20 liter

    Gear Capacity (cu. in.)

    6 L: 366 cubic inches

    10 L: 610 cubic inches

    14 L: 854 cubic inches

    20 L: 1,220 cubic inches



    Compression Straps



    Cordura nylon


    6 L: 5.5x14 inches

    10 L: 7x16 inches

    14 L: 8 x 18 inches

    20 L: 9x20 inches


    6 L: 2.4 ounces

    10 L: 2.6 ounces

    14 L: 3 ounces

    20 L: 3.3 ounces

  • Reviews
    112 reviews with an average rating of 4.6 out of 5 stars

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