Geox Waterproof Boots, Geox Simbyos, Simbyos J46L0B Boots, Blue with orange and black trims. Geox Simbyos is a great, tough looking waterproof boot from Geox. There is a hydrorepellent synthetic and textile upper, a warm polyester fleece fabric lining with a Geox waterproof membrane. There is a removable, thermal insulated fleece fabric footbed and two fully adjustable hook and loop straps to keep the boots secure on the foot. There is a chunky rubber sole that is formed around the boot for added protection to the toes. These Geox waterproof boots also contain the unique Geox perforated sole unit that allows the boots to breathe in that they allow the hot sweaty air inside the boots to escape while stopping any moisture getting back onto the foot.