The Pro-Knot Outdoor Knot Cards are a practical and authentic tool for outdoor enthusiasts, featuring 20 of the best rope knots to cover every tying situation. Made of waterproof and lightweight plastic, these cards are perfect for camping and other outdoor activities. The cards are compact and easy to carry, making them a must-have for anyone who enjoys the great outdoors. Made in China, these knot cards are a reliable resource for tying secure knots in any situation.