TushBaby Hip Baby Carrier, Grey Brand_Kinderlift It is a perforated mattress

It is a perforated mattress for air circulation and has a waterproof lining

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The shoulders are removable allowing you to first remove one and then the other as your baby learns to sleep with her arms free

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TushBaby Hip Baby Carrier, Grey Brand_Kinderlift It is a perforated mattressCondition: Barely Used "An easy way to carry your little one with this simple hip seat. The waist belt straps around you with one simple click and you can relive the strain on your back and shoulders by letting baby sit right on the seat while you support them with your arm. It also includes a large storage pocket for any essentials you need to carry with you."