SYNOVA FIBC Bulk Bags are durable, flexible fabric bags made for storing, shipping and dispensing seed, soil, sand, fertilizer, rock, mulch and more. Easy to fill and refill and easy to empty, our bags are collapsible to reduce storage space until they are reused. SYNOVA FIBC Bulk Bags feature a duffle top with a tie and a spout bottom with a Velcro tie, and empty with minimal dust particles and air contamination.