noun which may take the genitive case particle 'no', noun
leather; leather-bound; made of leather
Describes items manufactured from leather, such as bags, shoes, or book bindings.
彼は革製の手帳を愛用している。
He loves using his leather-bound notebook.
このバッグは革製で、とても丈夫です。
This bag is made of leather and is very durable.
革 (かわ) is the material 'leather' itself, while 革製 (かわせい) means 'made of leather'.
Compound of 革 (かわ, 'leather') + 製 (せい, 'made of').