This heavy-duty U-panel FIBC is customized for sand and granular construction materials with a safe working load of 2 tons. Equipped with side-seam lifting loops, large top skirt for easy filling and dual bottom discharge spouts for rapid unloading, it perfectly matches construction loading operations. Adopting blue overlock stitching, double cotton leak-proof strips on all seams, reinforced binding edges and attached non-woven fabric layer, this sand bulk bag effectively stops fine sand leakage and strengthens abrasion resistance. It serves as durable packaging for sand, gravel and construction aggregates, and we provide structural customization service for global bulk packaging purchasers.