Where Estheticians Get the Edge California Skincare Supply (CSS) is a wholesale distributor of the absolute best skincare product lines, supplies and equipment for estheticians. We educate estheticians in basic to advanced skincare techniques as well as product knowledge, sales and equipment so that they are equipped to provide the best products and services to their clients. This is what we call "The Esthetician's Edge." CSS values clients above all and treats everyone personally and with honesty, integrity and kindness.