I opened the box when taking the photos, but I haven't used it. Size: XL Cooling vest, instant cooling PCM cold-feeling material, up to 6 hours of cooling, reusable, super energy-saving, cool vest, naturally freezes at 28°C, no condensation, removable cooling mat, heatstroke prevention, outdoor work, commuting, sports viewing ☆━━━━━━━━━━━━━━━━━━━☆ #Click here for RIKU's product list ♥♡♥ ✔︎︎︎︎Instant purchase is welcome! ✔︎︎︎︎Bulk purchase welcome, feel free to comment ✔︎︎︎︎Free shipping!