This picnic mat is made of aluminum film with a doublesided waterproof coating, providing a reliable moisture barrier. It prevents ground moisture from penetrating the surface and helps keep the mat dry. Key benefits Moisture protection: doublesided waterproof design blocks ground dampness to keep the mat dry. Easy setup and use: quick to spread out on any surface and comfortable for sitting or resting. Portable and compact: folds easily for compact storage and convenient carrying in a bag or car. Versatile and durable: suitable for a range of outdoor activities and can be used as a play mat or sleep pad when needed. Material and performance Material: aluminum film Coating: doublesided waterproof Function: moisture barrier that prevents dampness from seeping through Durability: lightweight and foldable for everyday outdoor use Size and compatibility Folding design allows compact storage; size when folded is small for easy transport Designed for general outdoor use such as picnics, beaches, hiking stops, car trips, and outdoor events Use scenarios Outdoor picnic: lay it on grass to stay dry, protect against damp ground, and provide a clean resting spot for family and friends Beach day: use as a dry surface on sand, easy to shake off and fold back into a compact carry size Road trips or outdoor events: serve as a comfortable ground mat for rest breaks, or as a play mat for children; can also be used as a sleep pad when needed