Heatstroke Prevention Operation confirmed. Used only once for a short time. The vest is XL size. ・Set Contents 　IC101 Vest x 1 　IC01 Compact Battery x 1 　IC01-1 Peltier Fan Unit x 3 　IC01-2 Fan Cable x 1 　IC01-3 Charging Cable (USB Type-C) x 1 　Instruction Manual [Vest] ・Clothing Color: 35. Black ・Material: Power Mesh (75% elongation) ・Composition 　(Outer Fabric) Nylon 88% Polyurethane 12% ★Features of the ICE CRAFT series: Recommended points★ Comfortable cool-down with -18 degree strong cooling Peltier elements directly cool with electricity, allowing you to feel cool instantly. Two-stage adjustment is possible from an environmental temperature of 35 degrees: "Strong (-18 degrees)" and "Weak (-12 degrees)". Equipped with a sway mode that repeats cooling for 90 seconds ON and 13 seconds OFF. You can select cooling points with 6 mounting holes You can choose and attach points from the 6 holes: 3 around the neck, 1 on the back, and 2 under the chest. You can use it efficiently because you can choose the cooling points according to the work content and environmental temperature. Quiet design for stress-free use A quiet design that can be used comfortably even in quiet environments such as libraries and offices. Breathable and fits the body Mesh fabric specification that is breathable and does not get stuffy. The excellent elasticity fits the body and is a nice point with less stress. The adjustable belt fits any body type. ★The ICE CRAFT series is recommended for people like this!★ ●Those who work outdoors in the scorching heat: Those who work in agriculture, construction sites, and delivery services. ●Those who work in a quiet environment: A quiet design that can be used with peace of mind in offices, libraries, and customer service. ●Those who want to stay cool for a long time: A high-performance battery provides about 3.5 hours of powerful cooling. ●Those who want to enjoy customization: You can add a Peltier fan unit or combine it with work clothes with fans to create the optimal cooling environment for yourself.