Neon colored in normal light. Incredibly bright under blacklight. * 100% latex construction; can be filled with helium if desired * 11 inch diameter when fully inflated * Blacklight reactive only; they do NOT glow in the dark. Balloons purchased from China on this product page will NOT be the same as pictured! * Don"t be fooled by similar items from China on this product page. ONLY DirectGlow manufactures these blacklight reactive balloons here in the USA! Ships fast & FREE from USA!