100% wool brown turtleneck sweater, size S, long sleeves. It's very warm because it's wool, so you don't need Heattech. I was fine with just this one under a down jacket. The wool condition is also fluffy. The size is S, but I think it would be okay for those who usually wear M. - Color: Bean paste-like brown - Size: S - Material: 100% wool - Style: Turtleneck - Sleeve Length: Long sleeve Color...Brown系 (Brown-based) Material...Wool Neck...High neck/Turtleneck Season...Autumn/Winter Stains, tears, odors, etc....None