Lot of 2 Halo Ideal Temp sleep sack swaddles. Blue and gray is 0-3 months, beige and pink is 3-6 months. The gray I am reposhing, the beige I bought new and used a handful of times. They are both in very good used condition. In the time I have owned them, I only used unscented detergent. Loved these, my daughter has just grown out of them. I think they have a lot of life left! From the Halo website: Best-selling Ideal Temp is the ONLY swaddle that helps regulate your baby’s temperature. Featuring IntelliThread™ technology, our innovative smart textile absorbs heat, stores it, and then releases it back to your baby, maintaining an ideal temperature and avoiding temperature spikes (that often lead to wakeups). Yes, really. Bonus points: IntelliThread™ fibers are embedded in the fabric, so they won’t ever fade or wash out! Ideal Temp is made from a temperature regulating fabric that’s stretchier than standard HALO cotton or microfleece. Because of this stretch, Ideal Temp can run slightly bigger than other swaddles. Make sure to choose the correct size for your baby’s current height and weight rather than having them “grow into it.” We recommend sizing down if between sizes.