Only Faith Men's Short Sleeve Pajama Nightwear Silk Bathrobe Imitated silk fabrics Short sleeve without collar Skin-closely,Breathable,no stimulation, silky soft and thin Waist strap for comfort sizing Relaxed,roomy fit to ensure maximum comfort while lounging and sleeping. Asain size,runs small.please check the size chart carefully and choose one size up if you not sure about it.