Jack’s Mama’s Creations booties are made with a soft yarn that’s an acrylic/wool blend. The inner sole of the booties are available with a minky insole and faux suede outsole or with a shearling insole and faux suede outsole. The booties Petit Prince and we have are made with the shearling insole. The booties are intended to be worn indoors, in the stroller, or in a baby carrier, but can be worn outside if it’s dry. There are a variety of button styles to choose from, if you want that type of embellishment added to your booties. There’s a tie woven through the ankle of the booties that works great to keep the booties on your baby or toddler’s feet.