Lululemon Fast As Light Black Gray Speckled Scallop Running Short Low rise Size 4 These shorts were finished with a beautifully crafted hem to reduce bulk and feel lightweight when you're on the run. 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 built in underwear