HEAVYWEIGHT : Strong enough to use wet media on both sides of page. Great for artists combining dry media mixed with . CRAFTED FOR MIXED MEDIA: Double-sized (from non-animal materials) for enhanced wet strength and glowing color. ERASABLE & TOUGH: Withstands multiple erasures and holds up well to layered light washes of wet media. DURABLE: Premium U.S. sewn binding, deluxe covers and heavy-duty art equals a sketchbook that is built for serious use. PREMIUM QUALITY: Exceptional features make the popular sketchbook choice, cherished by artists of all levels.