Children's functional underwear that is seamless, pleasant to the touch and maximally breathable Coolmax Iguana children's thermal underwear is seamless, pleasant to the touch and maximally breathable.  Provides perfect sweat drainage. Give your little one the comfort of wearing and dressing. The elastic band at the waist is also practical. pants lined with elastic cuff breathability elastic band comfort practicality Material: 56% nylon, 36% polyester, 8% elastane