Woolino 4 Season Ultimate Baby Sleep Bag Merino Wool & Organic Cotton Color: Sun Size: 2 months - 2 years Well loved. This sleep sack was our JAM. Kept our baby at a cozy temp from fall all through spring! So soft and warm and cozy. I wish they made adult versions, hah. My little one used to grab the neck,chest area and hold it to their mouth for comfort. I tried and tried with everything to get out the giant drool stain and am unable to. It’s clean otherwise (i’m a germaphobe and keep everything super clean)! Never had any blowouts or throw ups in this sleep sack. Only the big drool stain, aha. Only ever washed in unscented baby detergent and hung dry.