Esembly size 1 diaper outer. It's difficult to capture the true yellow color of this diaper cover so I've included a screenshot from their website. Used to diaper one baby for approximately 4 months. No stains, all snaps in working order, elastic leg bands in perfect condition, and washed according to esembly's instructions. Fits infants between 7-17 lbs. Can be used as a swim diaper as well. Works great, love the brand, just finished using this size and now using size 2!