Fastlite NeoDown® Jacket
Highly-thermal insulating jacket designed for mountain activities in cold and variable conditions. Its NeoDown filling, made of hollow fibers with 24% bio-based Sorona®, mimics the structure of natural down, ensuring comfort, stable warmth, and lightness even in humid environments. The 20D nylon outer fabric (42 g/m²) offers durability and a refined appearance, balancing technical performance with a casual design suitable for everyday use.
Thanks to its lightweight, compressible construction, this jacket packs easily into a backpack without losing thermal efficiency. The PFC-free DWR C0 finish repels moisture, helping maintain the insulation’s loft and warmth even in light rain or wet snow. Ideal as a mid-layer or lightweight outer layer, it combines warmth, breathability, and versatility for cold-weather mountain days.
FAST&LIGHT – 566 g (S)
Fastlite NeoDown® Jacket
Highly-thermal insulating jacket designed for mountain activities in cold and variable conditions. Its NeoDown filling, made of hollow fibers with 24% bio-based Sorona®, mimics the structure of natural down, ensuring comfort, stable warmth, and lightness even in humid environments. The 20D nylon outer fabric (42 g/m²) offers durability and a refined appearance, balancing technical performance with a casual design suitable for everyday use.
Thanks to its lightweight, compressible construction, this jacket packs easily into a backpack without losing thermal efficiency. The PFC-free DWR C0 finish repels moisture, helping maintain the insulation’s loft and warmth even in light rain or wet snow. Ideal as a mid-layer or lightweight outer layer, it combines warmth, breathability, and versatility for cold-weather mountain days.
FAST&LIGHT – 566 g (S)
Activity
Alpinism, Outdoor
Equipment
20D nylon (42 g/m²) outer shell, abrasion resistant
Central YKK® zipper, highly durable
Double-slider for easy use with a harness
Two side pockets with YKK® zippers
Elastic inner pocket for personal items
Adjustable hood with rear drawcord
Elastic cuffs for improved heat retention
Adjustable hem with elastic cord and side toggles
Includes compression sack for compact transport
Outdoor Fit: comfortable pattern that doesn’t restrict movement
Size
Suggested Size Reference (Height/Weight)
Garment Measurements (cm.)
Weight
Size S – 566 g
Size M – 585 g
Size L – 617 g
Size XL – 635 g
Size XXL – 656 g
Technology
NeoDown®
The NeoDown® insulation blends recycled hollow polyester fibers with 24% Sorona® BIO, creating a stable three-dimensional structure that traps warm air effectively. It retains its loft and comfort even in humid conditions.
The 20D nylon (42 g/m²) outer fabric with PFC-free DWR C0 finish provides water repellency and abrasion resistance. Together, they deliver lightweight, durable warmth ideal for regular use in FAST&LIGHT mountain activities.
Maintenance
Information about care and maintenance
More information
How to choose your OS2O synthetic jacket?
