1. No ice packs! Keeps you dry even when you sweat. The 3D mesh material with a three-dimensional structure allows air to circulate at all times, so it wont get sticky even when you sweat, and it will always keep you dry. 2. Uses a special mesh that is soft to the touch. The surface that touches the babys skin is made of a special functional mesh that feels good to the touch.So you dont have to worry about the mesh rubbing and rashing your babys skin. 3. Excellent elasticity and will look like new even after long use! The 3D mesh material has a 3D structure that provides considerable thickness and cushioning, and has excellent elasticity, so it can be used for a long period of time.