Breaks down quickly. Not a no-brand product. Product improved through repeated refinements. Japanese brand product. [Color] Black [Size] Free [Specifications] [Uniworld] ICEMAN PRO Water Cooling Vest PRO WORK TRIBE 7790 Chilled water cooled by frozen PET bottles runs through the tubes. Cools the body and reduces fatigue. Heat対策 for outdoor work and outdoor activities in midsummer. Lightweight, quiet, quick, and long-lasting cooling. Cooling time: Approximately 4 hours: when using the longest timer mode. [Full set ready to use] Cooling vest PRO black Lithium-ion battery (5200mAh with timer function) USB charging cable *AC adapter is not included. [Cool your body in 3 easy steps] 1. Put about 150ml of cold water into the tank on the back. 2. Put a frozen PET bottle into the tank on the back. 3. Battery is stored in the front for easy operation. Outer fabric: 100% polyester, Lining: 100% polyester ● Cools the front chest area! ● Can be used as an inner vest! Battery with timer function for long-term use! *3-step adjustment is possible. Size: Free (S to 5L compatible) [Battery usage time目安] Cooling UP mode: Continuous operation: Approximately 12 hours Long-term use mode: 20 seconds operation - 45 seconds stop: Approximately 40 hours Longest use mode: 20 seconds operation - 1 minute 30 seconds stop: Approximately 50 hours [Appearance] Brand new, unused This product is one-of-a-kind. Sales end when sold out. [Shipping] Free Simplified packaging to reduce dimensions. [Please purchase only after carefully reading and understanding all the text] [Other] ○ No product warranty. ◯ Questions will not be answered. ◯ Questions after purchase will not be answered. ◯ Negotiations on discounts, shipping costs, packaging specifications, and shipping methods will not be entertained. ◯ Cancellations are not possible. ◯ Shipping will take 8 days. The exact shipping date cannot be provided. Date and time of arrival cannot be specified. Please refrain from purchasing if you are in a hurry. ◯ Also sold elsewhere, so there is a chance it may sell out by a narrow margin. ◯ Please make payment within 12 hours. Orders will be deleted after that time. ◯ Oversight, insufficient explanation, and misunderstandings may occur. [Please refrain from purchasing if you are overly concerned about details] [No claims, and negative feedback for returns will not be accepted] ◯ Receipts will not be issued.