This is a UNIQLO Alexander Wang HEATTECH item. I believe it's originally designed to be a tight fit. It felt snug, like I was wearing compression underwear, so I've only worn it a few times. I washed it in a delicate cycle for this listing. 【Shipping Method】 It will be simply packaged in an OPP bag and shipped via Rakuraku Mercari's Nekopos service. ● Other Notes: Please check the photos and understand that this is a used item before purchasing. I'm offering it at a lower price than the market value, so please take this opportunity. I am also listing other items, so please be aware that I may remove this listing suddenly. Please note that as this is a used item, we regret that we cannot accept returns or exchanges. This is a USED item, so please refrain from purchasing if you are sensitive to such items or do not understand vintage clothing. Also, please refrain from purchasing if you are concerned about creases from folding during shipping. Thank you for your understanding.