2-in-1 Valve The larger valve for quick inflation/deflation and the smaller/one-way valve for adding air to desire firmness. Our mattress have three layers, which are PVC layer, waterproof layer and skin-friendly flocking layer. You can easily deflate and inflate within several minutes. It is a good choice for trip and camping in the tent, or you can place in the house as well Service: If there is any problem such as gas leakage/deformation/damage, please do not hesitate to send us a message immediately, we will provide free replacement service. Warm Tips:Due to the ductility of pvc, inflatable mattress may become soft within a week after the first use, this is a normal phenomenon, not caused by air leakage. Only need to inflate again for 30 seconds, the mattress will become stronger.
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