560g/m² - Outer Material: (44% Polyester, 52% Cotton, 4% Spandex); Inner Material: (95% Polyester, 5% Spandex) Imported Pull On closure 【COMPOUNDED COMFORT】 The velvety inner material is a blend of 95% polyester and 5% spandex, which will not only feel silky smooth against your body, but will keep you at an ideal temperature in harsh climates. The outer material is made of 52% cotton, 44% polyester and 4% spandex, which is results in a lush soft fleece.The 1/8" thick layering of these fabrics will feel like a second skin and effectively seal out the cold. 【INDISPENSABLE HEAT】The ultra heavyweight base layer is the perfect choice for people living, playing, or working in frigid temperatures who expect proper heat retention from their thermals. 【ELASTIC & SNUG】The sturdy stretch material allows complete unrestrained freedom of movement while the ribbed cuffs prevents wind from penetrating to provide superior comfort and function. These thermals will move along with you and stay cosy to protect you from the elements. 【OPEN FLY】 These long johns have a double layer open fly design for easy access and convenience when nature calls. 【SATISFACTION GUARANTEE & CUSTOMER SERVICE】Contact us at any time if you have any questions. We will offer you the best service to reach a satisfactory solution.