1.This product will be folded and squeezed during the packaging and transportation process, which may lead to deformation of the soft PVC nozzle, so if you find that the nozzle is deformed before inflating, you need to restore the nozzle first. The nozzle can be softened by heating (using a hairdryer or boiling water) until the nozzle is restored and the cover can be tightened normally before inflating and using the product again. After inflation, the nozzle must be as tight as possible! 2.What happened to the slow air leak at the beginning of use? Inflatable products (including tires) are naturally slow to withdraw air, which is a normal phenomenon. This is normal, especially when the new material has some stretching at the beginning. Therefore, the first few times you may need to refill the air every day, and when the stretching of the material is complete, you can refill the air 1-2 times a week. 3.What happened to the "bulging" of the paper later on? The bulging is caused by over-inflation,Especially in the heat of the day, as the material is plastic and will expand and contract. So parents receive the goods filled with eight minutes of air can be, so that the material has a stretching process, one person can sleep with sufficient air, two people sleeping to put some air. 4.received the product smell how to do? This product belongs to PVC products, due to long-term sealed packaging, when opened there is a little smell, it is normal, just put the ventilation (depending on the weather) drying 1-3 days or so the smell disappears. All our products are made of friendly materials and meet safety standards, please feel free to use them