We've eliminated the side seams for a comfortable fit. It features a soft, 100% cotton fabric. The cotton is organic. 【Materials】 By using thinner threads and increasing the fabric density, we've created a delicate and skin-friendly texture. Furthermore, by newly adopting air tumbler processing, which uses air pressure to soften the fabric without water, we've achieved a soft and fluffy texture while also reducing water usage by 1 liter per garment. This product is beneficial for both the wearer and the environment. 【Design】 The button-up collar allows for a 2-way style, letting you adjust it to your liking depending on the temperature or your mood. The waist has an elastic waistband with an adjustment opening, allowing you to adjust the fit by pulling out the elastic and sewing it in place. The elastic is not fixed, so it can be replaced. 【Specifications】 Transparency: Slightly sheer Fabric Thickness: Thin Fit: Relaxed Waist: Elastic waistband (with adjustment opening) Care Instructions: ● Dark-colored products may transfer color due to friction during use or contact when wet. Wash separately from other items when washing. Care Instructions 2: ● Due to the nature of the material, pilling may occur due to friction during wear, washing, or cleaning. In such cases, please take care of it promptly with a pill remover. Washing Instructions: ● Do not use detergents containing fluorescent whitening agents on light-colored products. Washing Instructions 2: ● Do not iron the printed areas.