This trial T-shirt is similar to Uniqlo's Heattech in terms of material and comfort. It's perfect as a winter inner layer. Because it's thin, it won't get bulky when layered. It's thin but durable (it won't tear even if you take it off roughly). According to the photo on the bag, the cuffs are not straight, but gathered. Reference: Moisture-absorbing, heat-generating warm innerwear "Onfeel" https://www.trial-net.co.jp/mag/detail/10408/