The Resty 4D cooling sleep mask promises to promote improved sleep quality through its versatile functions such as cooling, heating and aromatherapy. This review rates the sleep mask in terms of material, workmanship, quality, comfort, cooling therapy, heating therapy, aromatherapy and price/performance.MaterialThe Resty 4D sleep mask is made of skin-friendly materials that are known for both their softness and durability. The choice of materials contributes to the overall durability of the product and makes it a reliable companion for everyday use.ProcessingThe processing of the sleep mask is okay, with clean seams and an even distribution of the inserts. In my opinion, the individual components could fit better. And unfortunately the zipper also gets stuck every now and then.QualityThe quality of the Resty 4D sleep mask is reflected in its robust construction and reliable function. The integrated protection mechanisms against overheating and the careful selection of the aromatherapy inserts ensure safe use.Wearing comfortThe wearing comfort of the sleep mask could be better. It adapts gently to the contours of the face and sits without putting pressure on the eyes. But I still find the snap fasteners annoying. The soft material and the adjustable straps ensure an individual fit and a comfortable feel.Cooling therapyThe cooling therapy of the sleep mask offers effective relief from swelling and tired eyes. The hot-cold pack can be easily inserted and cooled as needed, allowing for flexible use.Heat therapyThe heat therapy, enabled by the chamomile/linseed insert, promotes relaxation and can help relieve headaches and sinus problems. The heat is distributed evenly and provides a soothing experience.AromatherapyThe aromatherapy insert with chamomile offers an additional level of relaxation. The gentle scent helps calm and supports restful sleep, making the sleep mask a multifunctional relaxation tool.ConclusionThe Resty 4D cooling sleep mask is a versatile and effective solution for anyone looking for improved sleep quality. With its combination of cooling, heating and aromatherapy, it offers comprehensive relaxation and promotes restful sleep. The solid workmanship, high level of comfort and good value for money make it a recommendable purchase. Personally, the sleep mask did not convince me. Nevertheless, I give the sleep mask 3 out of 5 stars.