Product Name: Ikihada Underwear - Warmness Layer - Men's Long-Sleeve Crew Neck Shirt (Product No.: 4208-34) Features: A "trio" structure of microfiber, bulky yarn, and napping boasts more than 3 times the heat retention of general innerwear by trapping plenty of air. Specifications: Double-sided napped, stretchy, elastic cuffs. Country of Origin: Made in Japan. Use: Men's innerwear for cold winters. [More than 3 Times the Warmth with Plenty of Trapped Air!] The air layer created by the three elements of microfiber, bulky yarn, and napping traps plenty of warm air, achieving more than 3 times the warmth compared to general innerwear. [Easy to Use and Fits All Occasions] Perfect for casual and business styles, as well as sports and outdoor activities. It looks like a sweatshirt, so it can also be used as loungewear. [Simple & High Quality] A simple, high-quality undergarment that fuses the goodness of "traditional underwear" with "modern sensibility." This product is perfect for those looking for comfortable and functional innerwear. [Gentle Comfort You'll Want to Wear Every Day] Based on years of experience in making underwear and innerwear, we have focused on achieving the "best comfort." The natural feel of the napped fabric, the pattern designed for ease of movement, and the moderate firmness create a "gentle comfort you'll want to wear every day." [Country of Origin] Made in Japan [Applicable Chest Circumference (cm)]: M 88-96 Size Measurements Shoulder Width: 36 cm Length: 65 cm Body Width: 35 cm Sleeve Length: 56 cm Description [Peace of Mind Only with Domestic Innerwear] ● Raw Materials: Uses two types of bulky yarn made from domestic microfiber and high-stretch nylon. ● Knitting: Produced by a low-gauge knitter in Wakayama. Uses a small-gauge knitting machine (no side seams), which is rare worldwide, and is designed for comfort against the skin. ● Dyeing: Processed at a domestic dyeing and finishing factory with excellent napping technology. Finished into a fluffy material with double napping. ● Sewing: Sewn at our own factory in Kyushu, where we have been making innerwear for many years. Production is integrated domestically from fabric creation to sewing. This is a new and unused item, but it has been stored at home. Please purchase if you understand this. Thank you for looking.