The ventalux aircool spring interior cot bed mattress is the ultimate in comfort and safety and features a mini bonnell spring core which help maintain the shape of the mattress and prolong its lifespan the mattress cover is extra padded moisture resistant and breathable and offers protection against dust mites the cover can be wiped clean and is zipped around three sides of the mattress making it easy to remove for washing this mattress also includes topper pad for extra comfort and allows