Lululemon All Tied Up Tank Cut Back Stripe White Black You've got options: Wear this yoga tank long and loose while you flow or tie it back for inversions. pima cotton Pima Cotton fabric is breathable and soft against your skin features Designed for: Training Lycra: Added Lycra fibre for shape retention Neck coverage : High neck design adds coverage Breathability: Open back provides ventilation Roomy armholes: Armholes give you freedom of movement Fit: Classic fit, hip length No size/material tag. I think this is an 8 - approximately 19" across bust, 24" shoulder to hem. Great condition.