Lululemon Belle Jacket Alpine White Size 10 Gently used. Please see all photos for more details and measurements. When temps start to dip, zip into this lightweight jacket and you're good to go. Swift Ultra Light Four-way stretch Swift Ultra Light fabric is an airy, lightweight fabric woven to wick sweat and provide airflow—seriously, it’s like being in the buff four-way stretch lightweight sweat-wicking woven for airflow