... and solving all possible issue during the production.This is rubber slipper we are producing to french customer, becasue all slippers ... , because we dislike to suggest our customer to use rubber strap, because rubber strap is very sensetive to be yellow, silicon plastic ... slipper as follows:1/Strap : Silicon plastic Strap2/Sole : durable rubber and EVA mixed material for sole, strong, soft and durable ...