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ULTRALIGHT, EVERYWHERE.
Our ultimate expedition kit gets
1000 down & 10% lighter

We've extended our 'K Series' range to include our Ultimate mountaineering / expedition sleeping bags - the Diamir Range - and our Xero expedition Down Clothing. All 10% lighter thanks to 1000 fillpower down and our lightest-ever fabrics.

Xero Down Salopettes: K Series
'K Series' version of our Xero salopettes. Exceptionally lightweight high-altitude expedition salopettes. Warmth to weight at the limit of possibilities.
from $713.91
745g
-40°C
Xero Down Jacket: K Series
'K-Series' version of our high-altitude expedition jacket. Light enough for the ascent, warm enough for when the mercury freezes. Warmth to weight at the limit of possibilities.
from $998.48
1130g
-40°C
Xero Down Suit: K Series
'K Series' version of this high-altitude expedition suit. Light enough for the ascent, warm enough for when the mercury freezes. Warmth to weight at the limit of possibilities.
from $1,449.04
1535g
-40°C
Xero Down Trousers: K Series
'K Series' version of our Xero down trousers. Exceptionally lightweight high-altitude expedition trousers. Warmth to weight at the limit of possibilities.
from $584.11
575g
-40°C
Diamir 900 Down Sleeping Bag: K Series
Warmth to weight taken to the limit with our 'K Series' version of this high-specification expedition bag, cut roomy enough for stashing kit and for comfort at altitude.
from $1,245.60
1570g
-32°C
Diamir 1200 Down Sleeping Bag: K Series
Warmth to weight taken to the limit with our 'K Series' version of this high-specification expedition and polar bag, cut roomy enough for stashing kit and for comfort in extreme environments.
from $1,466.52
1880g
-48°C