I used these for weekly soccer lessons during the cold season. They seem very warm with the fleece lining. Due to the material, there is some minor pilling and fuzzing, but I think they can still be used. Features: "One piece that changed winter" - If you're warm with just one piece, there's no need for unnecessary layering. One piece that allows you to always perform at your best in the cold and take you to the next level. Mesh panels are used under the crotch to increase breathability. Ergonomic flatlock seams improve comfort and mobility. ARMOUR wordmark waistband. COLDGEAR ARMOUR: By using high-density microfiber yarn, it provides both warmth and comfort, and prevents chills with its high sweat-wicking and quick-drying properties.