Super thin material, but that's fine for me as my office building is always warm. I bought it in white and it's so thin you can see my shoulder tattoo right through it, so keep that in mind if you work for a more conservative company and are planning to buy this to cover up. It is comfortable and trendy enough that all I need to do is toss it on over a tank top and I'm work ready. It also pair well with jeans on those slightly cool nights where you want long sleeves, but not something too heavy.