The patented new design keeps the baby's foot free from irritation caused by interior seams. A smooth and soft material binds the seams along the sole of the shoe, protecting those perfect little tootsie from any fiber frictions or scratches. Like all of our APMA approved crib shoes, Kimi & Kai footwear is carefully handcrafted and designed to protect from rough surfaces and dirty floors while providing the important infant health benefits of being barefoot.