Lululemon On The Run Long Sleeve T Shirt Heathered Sapphire Blue Excellent condition. No size tag. Pit to pit measures 20". We designed this anti-stink long sleeve with a short back hem to give you full access to your back zippered pockets when you're on the run. Light Luon® Light Luon® fabric is a lightweight version of our signature four-way stretch, sweat-wicking Luon® fabric lightweight sweat-wicking four-way stretch cottony-soft handfeel naturally breathable