The perfect layer for yoga. I wear sleeveless tops for yoga as I want my arms free and I don't want my shirt to pull up when I raise my arms. But, sleeveless is too cold for warm up and cool down. I need a middle layer in between taking off my fleece and having my arms bare. This is a soft T-shirt material that washes & drys well and is easy to take off and put on on the move. It is the removable sleeves I was looking for.