Made from 140gsm, acid-free, artist paper, Travel Sketchbooks feature (64) sheets of artist-grade paper that is great for use with pen & ink, pencil and markers. Each book is bound with finely-woven European cloth, made with rounded corners, and includes a clear storage envelope on the inside back cover - all combining to offer the utmost durability when traveling. Available in (6) sizes and across (4) cloth book cover colors.