HIGH QUALITY & SAFE MATERIAL: The alphabet balloons are made of premium, ultra-shiny aluminum foil, they come with reflective surface and good sealing effect – they maintain form without leaking or losing air., EASY TO USE: Simply insert the straw (provided) into the plastic valve at the bottom of the letter and slowly blow to inflate. When the letter balloon is sufficiently inflated, pull out the straw and pinch tight the self-sealing plastic valve., REUSABLE: Easy to inflate and delate party banners can be used every year with proper care and maintenance. Simply store them away for future use., PERFECT PARTY DECORATION: Hang these giant foil birthday balloons in the kitchen, living room, garden, or party room and show the birthday boy or girl how much you care!,