SET OF 4: Includes 4 sand bags per pack, each bag can hold up to 16 lbs DURABLE MATERIAL: Made of heavy-duty Polyester with PVC coating. Features Water-resistant, tear and weather resistant, built to last SIMPLE TO USE: Designed with 1 handle and 3 Velcro straps for easy use. Please attach the weight bags to frame closely and firmly EASY TO FILL: Features a big opening with Velcro seal, you can easily fill it with sand, rock, dirt or gravel to add stability during windy conditions. (Please note: fillers are NOT included) EAGLE PEAK PROMISE: EAGLE PEAK offers a 1-year limited after sale protection from the original date of purchase. If you have any other questions, please contact our professional service team EAGLE PEAK is a premier greenhouse and canopy brand that delivers innovative product with ease-of-use, combined with premium design aesthetics. EAGLE PEAK is vertically integrated with one of the largest pop-up canopy manufacturers in the world. We invest in our product testing and product innovation laboratory to ensure that our product meets and exceeds industry quality standards and requirements. We are relentless in our efforts to innovate new ways to bring you safe, hassle-free, quality products. Our International & North American Product Development and Design teams work tirelessly to improve upon the status quo and deliver better looking and better functioning product to you.