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$2,400.00 CAD


- Descente Allterrain has teamed up with Amsterdam based brand Byborre to create a high spec version of the highly technical Mizusawa Down Jacket.  The Jacket uses Byborre's signature 3D knit, which creates space in between the jacket liner and the shell. This allows heat to be trapped where needed while still optimizing air flow to targeted areas around the jacket. The shell is produced in Dermizax Flexile Matte 4 way Stretch fabric using non-quilted thermal bonding and seam tape construction which makes it extremely waterproof.  The unique Parahood system allows the hood to be zippered closed when not in use to prevent water and snow from pooling around the neck.  Mesh panel between dual front zips, and under the arms, draws in air from outside to prevent uncomfortable heat and moisture buildup.  The Mizusawa Down Jacket is a deceptively simple jacket that uses many technological features to enhance comfort and function creating a truly unique down jacket.


  • Shell: 79% Nylon / 21% Polyurethane
  • Liner: 73% Nylon / 27% Polyester 
  • Insulation: 90% Down / 10% Duck feathers 
  • Byborre 3D Knit 
  • Waterproof 
  • Windproof 
  • Parahood system 
  • Duel zip ventilation 
  • Two zippered hand pockets
  • Zippered interior pocket  
  • Made in Japan    


  • Regular fit 
  • How we measure
  • S M L
    1/2 Chest 57 59 61
    Length 68 70 72
    Sleeve  53 55 57


  • Hand wash cold. Do not bleach. Do not tumble dry. Do not iron.

Domestic: $10 CAD flat via Canada Post Expedited Parcel (2-7 business days)
USA: $15 CAD flat via DHL Express Overnight (1-2 business days)
Europe: starts at  $32 via DHL Express (2-3 business days)
China: starts at  $20 via Epanex (15-20 business days) and DHL Express (3-5 business days)
Rest of Asia: starts at  $45 via DHL Express (2-5 business days)
Australia: starts at  $50 via DHL Express (3-5 business days)
Rest of the World: starts at  $50 via DHL Express (3-5 business days)For destinations other than Canada, and US, shipping charges are determined by the weight of each item of the order. Shipping charge breakdowns are indicated during the checkout process.Free shipping promotion only applies to the basic shipping option. Free shipping orders within Canada will be shipped using Canada Post Expedited Shipping; Free shipping orders to US will be shipped using DHL overnight shipping. International free shipping orders will be shipped using DHL Express. Please note additional tax and duty fee may apply for shipments outside of Canada. Such fees are outside of our control and thus ANNMS is not responsible for the additional charges. For further information on custom and excise policies in your country, please contact your local customs office.*Certain restrictions apply, all publications are excluded from from free shipping promotion. Free shipping promotion cannot be combined with any other promotion and/or sale items. All rights reserved by ANNMS. 

All regular priced items are eligible for exchange or store credit within 14 days from the purchase date, only in brand new, unworn condition. No cash refund. No return for publications.All sale items are final sale, no exception.All launch products are final sale, no exception. Please note ANNMS reserves the right to refuse any transactions, including exchanges/refunds, should the customer not comply with the aforementioned policies. Please ensure to contact us prior to any exchange or refund requests. ANNMS does not accept any returned parcels without prior communication with our staff.Unless specifically requested, ANNMS only provides receipts via email, please ensure to keep your email for return/ exchange purposes.  Please note, customers are responsible for all shipping charges to ship back orders to annms for exchange or refund for store credit.