Bought these (brown monkey pattern) for my 2 year old and they are just the CUTEST!!  They are super easy to slip on and off.  It hasn't snowed, yet, but he's worn them several times just to go out and get the mail or walk the dog.  That's a testament to how easy they are to slip on and off.  The velcro strap on the back secures them well to his feet while walking.  Love that they are machine-washable, too!