The side sleeper’s sleep mask from BOLLSEN Sleep Mask has impressed in our latest 2025 test with its outstanding quality and high comfort levels, securing the top spot. Particularly noteworthy are the luxurious silk material and the special design tailored for side sleepers are particularly noteworthy. Read our detailed test report below.

Results of the Sleep Masks Test: Our comprehensive reviews show that the DEEP SLEEP Mask by BOLLSEN sets new standards in sleep quality. The mask is specifically designed to meet the needs of those who value restorative sleep.

• DEEP SLEEP Mask (made of high-quality silk): Stands out for its comfort and effective light blocking. The soft silk material and ergonomic design ensure a pleasant night’s sleep.
  Price: £39.95
  Bulk discount: £49.95 (when buying 2x) and £59.95 (when buying 3x) 
  

  

• Travel Comfort: Its light and compact shape makes it the ideal travel companion – always ready for a quick nap or on long flights.
• Easy Care: Machine washability ensures hassle-free cleaning and lasting freshness of the sleep mask.

Award-winning DEEP SLEEP Mask: Distinguished by excellent design and superb craftsmanship. The adaptability to various face shapes and the adjustable strap were particularly praised. The manufacturer’s satisfaction guarantee reaffirms confidence in the product.

The results of our silk sleep mask test with the BOLLSEN DEEP SLEEP Mask are extremely positive. Compared to other sleep masks on the market, the DEEP SLEEP Mask stands out significantly. Our testers report a markedly improved sleep quality after just the first few nights. No complaints were made about discomfort or disturbances from light. Our conclusion: The BOLLSEN DEEP SLEEP Mask ensures optimal sleeping comfort and significantly contributes to darkness, thereby enhancing sleep quality, without compromising on comfort.

Comfort: The silk sleep mask is easy to adjust and, thanks to its soft material, feels comfortable on the skin. Our testers were particularly impressed with the pressure-balancing design and the high-quality silk.

Skin-Friendly: Another advantage is the hypoallergenic property of the silk, which is also suitable for sensitive skin types, contributing to a positive overall experience.

Durability: The high-quality craftsmanship of the DEEP SLEEP Mask guarantees a long lifespan. Several of our testers plan to use their mask long term due to its convincing robustness and ease of cleaning.

Return Policy: 40-Day Guarantee

Separately, we made another purchase and tested three different deep sleep masks from this brand. We ended up keeping one and applied to return the other two. We waited 35 days after purchase to see how the customer support would respond. To our surprise, the return process was incredibly easy. They sent us a return label right away, with no questions asked. The 40-day guarantee really does work.