Birko-Flor™ - Made of acrylic and polyamide felt fibers, this material is a soft fabric with a smooth leather-like finish.
The original Birkenstock footbed - Featuring pronounced arch support, deep heel cup, and roomy toe box. Footbed molds and shapes to your foot.
EVA - Flexible, lightweight, durable and shock absorbing.
Your toes and heel should not touch the rim of your sandals while standing in them. The extra room is needed to perform the natural rolling motion of the foot without restrictions - just as if you were barefoot.