The Feela 5-Pack Book Covers are made of neon stretchable fabric, designed to fit up to 9"x11" textbooks. These book covers are washable, reusable, and stretchable, making them durable and versatile for long-lasting use. The set includes 5 vibrant neon covers in a stretchable nylon material, perfect for personalizing and protecting your textbooks in style. Made in China, these book covers are a practical and colorful accessory for any book lover.