The advantages of having a battery case are many: they eliminate your battery anxiety (or at least extend it until a later time), free you up from being tethered to a wall outlet, and protect your phone from usual wear and tear. (theverge.com)
Washing it from time to time is not an issue as well because it can stay soft despite the usual wear and tear. (babieslounge.com)
Milliard promises as well that its Hypoallergenic Baby Crib Mattress was created with high density to keep it in shape despite the usual wear and tear — a CertiPUR - US certified in terms of foam quality. (babieslounge.com)