Benecos Konjac Sponge with Red Clay - for Sensitive Skin. Benecos Konjac sponge is made from 100% Konnyaku root and is enriched with natural red clay to help brighten and soothe devitalised and sensitive skin. The Benecos konjac facial sponge is a natural cleanser and a very gentle exfoliator. You can either use the konjac sponge on it's own or with your normal cleanser. The natural alkaline effect of the Konjac Sponge balances the acidity of the skin. Vegan.