Available in two sizes: 65 × 36cm/49 × 36cm, suitable for tents of different sizes, with more flexibility in choosing according to needs.Strong windproof: After filling with sand/stones, it can firmly fix the four corners of the tent, and even in strong wind weather, it can be as stable as a rock, guarding the safety of the campsite.Durable and Waterproof: Oxford cloth material is preferred, waterproof and wear-resistant, not afraid of outdoor wind and rain, and not easily damaged after repeated use.Portable and practical: The empty bag is lightweight and easy to store, and can be filled on-site for use without increasing travel burden.Stable design: With straps, it can tightly fit the tent legs, seal leak proof, and be worry free to use.