Direct pdf link: http://www.sheepytimeknits.com/knit/Patterns/SheepySack.pdf

http://www.sheepytimeknits.com/knit/patterns.htm

From the pattern:

“Here is my interpretation of a soaker sack. It’s a pretty simple design, easy to knit up even for a beginner, and ideal for the newborn period when it’s hard to put little noodle legs into soaker leg holes”