I accidentally bought this online, so I'm selling it. It seems thin and light, so it looks like it can be used until it gets really cold. The following is a copy-pasted description from the internet: This is an AddElm long-sleeved half-zip high-neck cut-and-sew shirt, made with mineral powder extracted from minerals. It's an item with a strong presence, featuring a two-tone color scheme and logo motifs in various places. It utilizes add.03 technology, developed for victory, which is a technology created to make performance more efficient. You can spend your time comfortably with the light and soft sporty material and three-dimensional silhouette. It is also recommended to wear it with a blouson or bottoms from the same series. Type: Tops Design: Long-sleeved cut-and-sew Neck Design: High neck/Mock neck