Spalding Spalding Volleyballs * Packed the sunscreen but forgot the air pump? No worries. You can now play all summer long with our line of NeverFlat volleyballs which are designed to remain inflated up to 10 times longer than normal balls. Each of our NeverFlat volleyballs, houses an exclusive membrane technology that tightens the natural pores in the bladder to improve pressure retention along with a valve cap that eliminates leaks and keeps dirt out. Additionally we use a proprietary technology called NitroFlate?