I've tried so many different types of training pants between the cloth diaper trainers to the Gerber ones to the Potty Patty and for me, the Carter's training pants are the best ones for my daughter.  They have that waterproof lining and the absorbent inside for any mishaps but they also fit my petite peanut best.  Even though she's 18 months old, she has a petite frame and still wears 12 month clothing, so these hug her just right and fit her best.