It's important to make sure that you're all layered up during cold weather conditions.That's why this thermal set will make a great addition to your winter wardrobe. These waffle thermal set are made of 59% cotton and 41% polyester. Thermal Crew Top: Long Sleeve Crew Top Semi-Fitted Ribbed Cuffs Thermal Crew Bottom: Covered Elasticized Waistband Ribbed Cuffs Semi-Fitted Sizes: L/XL