They're incredible lightweight and breathable with a regular fit that's designed for high performance

Inside leg in 32"/81cm

The fit of the Sirkos Evo is naturally a slimmer fit than some other models

while the fabric itself has been designed to deliver the perfect balance of warmth

They’re made using GRANITE Stretch Nano fabric

Finisterre - Firecrest Jacket - Womens Colour Description:Black They're incredible lightweight and breathableLightweight, versatile insulation that'll have your back as the seasons change. Named after the UK's lightest bird, the Firecrest range is the most lightweight insulation to date. Made from recycled materials, layer it up with T shirts, over knits or under a waterproof shell. Zip it up as the weather turns or the sun drops. Why You'll Love It Featherweight warmth our lightest insulation for easy layering Bound hems, cuffs & neck clean finish with