This product uses Polartec Power Grid, and its grid structure is lightweight and maintains warmth while also providing breathability to quickly wick away sweat. This product is a mid-layer (fleece) suitable for mountaineering and outdoor activities, balancing high breathability and warmth. It's easy to put on and take off, making it easy to adjust your temperature during activity. Gender: Women's Color: Blue Slate Heather (Blue系) Model Number: OL4073 (122OL4073) US Size: XS, equivalent to Japanese size S to M Width: Approximately 44cm Length: Approximately 62-64cm Purchased two years ago and worn once, but I'm selling it because it's too tight when I wear an inner layer. It's in good condition, but it's a used item, so please understand the condition.