The Hybrid Cooling Vest is lightweight and easy to (re)activate. The vest is suitable for multifunctional use, such as during work, sports and recreational applications. The Hybrid vest is designed to be worn in places where there is no extremely high ambient temperature and works best in low to medium humidity. The amount of airflow on the body determines the cooling effect and the duration of the cooling. By immersing it in water, the Hybrid vest can be used as a wet cooling vest, but is also prepared for the separately available Macna Cool Packs. These are available in 21? and 29? version. Activation - Nat: Immerse the product in water for 1 to 2 minutes. Then gently squeeze out the excess water. Finally, wipe the water-repellent liner (vest/headwear) with a towel before use. And you are ready to go! The Hybrid Cooling Vest cooling material is designed for up to 200 wet/dry cycles (activations). Over time, water absorption decreases as the fibers cluster together in the fabric structure. A reduction in water absorption may occur after the first 10 wet/dry cycles; after this the absorption remains relatively stable. This is a normal process. The material still offers very effective water absorption, evaporation and thus cooling capacity. The degree of absorption is also influenced by the maintenance method of the product and the water quality. Activation - Cool Packs: The time it takes to fully activate them depends on the Cool Pack temperature and the cooling method: Ice water: approx. 20 minutes Freezer: approximately 40 minutes Refrigerator: approximately 60 minutes You can also activate them by exposing them to an ambient temperature lower than: 19°C for the Cool Pack 21°C 26°C for the Cool Pack 29°C Whichever cooling method you use you can shorten the activation time by not stacking the packs, but laying them flat in a single layer. If you want to use them straight from the freezer, they may feel too cold to wear. It is therefore advised to wait at least five minutes to allow them to warm up to their set temperature of 21°C or 29°C, depending on the type of PCM you have chosen. Once the PCM has reached this temperature, it will hold it for hours! Features: Based on a unique cooling technology. Machine washable and has antibacterial properties. Easy to use (again). Light in weight, non-toxic and durable. Creates up to 15°C cooling relative to the ambient temperature. Provides cooling for up to 2 to 8 hours, depending on temperature/airflow/humidity. Classified as Category 1 PPE - for minimal risk only under European Directive 89/686/EEC. Specifications: Colors: Gray Material: Textile Style: Sports - Race, Touring - Adventure, Offroad - Enduro, Casual Suitable For: Men Weather Type: Summer Technical: Weight: 0.65 Model ID: 165.8056 Macna Men's Hybrid Cooling Vest