Fastlite 650 Down Jacket

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    (4,9/5) out of 12 total ratings
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    Ultralight insulated down jacket for FAST&LIGHT activities, warm, packable and easy to transport. Made of Nylon 20 D fabric, 100% windproof with a double layer construction that protects the feather from moisture. DWR (Durable Water Repellency) exterior treatment and 90/10 duck down 650 CUINS of fill power, providing a high thermal protection in a very light weight3 outside harness-compatible pockets and 3 inner ones. The Fastlite 650 is a piece of equipment that combines perectly durability, lightness and insulation.

    FAST&LIGHT - 452g (S)


    Mountaineering, Climbing, Skimo


    YKK® Vislon® zippers

    Helmet compatible hood

    Double fist for perfect fit with or without gloves

    Lateral pockets compatible with harness

    Chest and side pocket with YKK® zippers

    3 interior pockets (one with zipper) to store climbing shoes, softflask and mobile phone

    Highly compressible

    Outdoor Fit, offers total freedom of movement


    Size S: 452 grams

    Size M: 470 grams

    Size L: 503 grams

    Size XL: 526 grams

    Size XXL: 553 grams


    100% Nylon, 20 D, 400T, windproof, DWR (Durable Water Repellency) treatment

    Stuffed: 130 g of 90/10 650 CUINS duck feather with Non Live-Plucking certificate.

    90/10: Proportion of down (90%) and feathers (10%) in the filling

    650 CUINS: CUINS stands for "Cubic Inches per Ounce" and is used to measure the insulating capacity of down. The higher the CUINS number, the greater the volume of the feather for the same weight and therefore, its insulation capacity. In this case, 650 CUINS indicates that the down has good thermal insulation capacity.

    Down is a natural product and therefore it is normal to have some dark groups of feathers or clusters on the inside of the jacket, even on the whitest down. In OS2O we prefer not to bleach them with bleach as it is tremendously harmful to the environment. This is why, in some cases, small dark areas inside the garment can be seen that in no way affect its performance.

    Thermal insulation index (CLO): 3.11


    Most common size (Height/Weight)

    cm / kg165170175180185190
    75 MLLLXL
    80  LLXLXL
    85   XLXLXXL
    90    XXLXXL


    Information about care and maintenance

    Specific References


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