Molchanovs Core Silicone Bifins are a pair of white-colored fins designed for freediving, snorkeling, and scuba. The fins are made of silicone material and come in size EU 40-41. These fins are manufactured by Molchanovs, a well-known brand that makes fantastic quality products. The fins have been lightly used and are still in great condition. They were a little too tight for me, so I am buying a larger pair, but getting them shipped from Molchanovs directly is nearly $200 - hoping to sell this to put towards a new pair. Really great fins and easy to travel with!