Vionic Gemma II - Women's SlipperVionic Gemma II Arch Support Slippers for Women: Comfortable Steps and Easy to Wear The Vionic Gemma II Women's Arch Support Slipper has an upper made with 100% polyester terry material and hook and loop adjustability. This women's slipper is easy to wear due to its slip on style, making it perfect for a full day excursion at the spa. The Gemma II is not like your ordinary spa slipper because it's designed with Vionic's APMA accepted orthotic footbed