OUR CORE X GROW BAGS ARE THE MOST DURABLE BAGS WE MAKE. OUR NEW CORE X MATERIAL IS BUILT TO HANDLE THE ELEMENTS AND EXTREME WEATHER. THE MATERIAL ON OUR CORE X GROW BAGS HAS BEEN DESIGNED TO PROTECT AGAINST RIPS, FADING AND SAGGING. THESE ARE DESIGNED FOR OUTDOOR GROWERS BUT ALSO WORK GREAT INDOORS.