Introduction
Isomers may not be splashed across every billboard yet it has quietly built a reputation for science led formulas that punch above their weight in performance. The brand is known for spotlighting hardworking actives without the usual fanfare and its latest launch, the Diamond Peptide Overnight Hydrating Mask, is no exception.
The name alone sounds like it belongs in a high-end jeweler rather than on a bedside table, but behind the sparkle Isomers promises serious skincare: deep moisture for thirsty complexions, a peptide boost to soften fine lines, overnight revitalization and a shield of antioxidants for mature skin. In short it aims to send you to sleep and let diamond peptides do the heavy lifting while you dream.
Curious whether the claims translate from press release to pillow test I committed to two full weeks of diligent evening applications, tracking texture, tone and overall morning radiance. Here’s what I discovered about whether this gem is worth your hard-earned cash.
What is Diamond Peptide Overnight Hydrating Mask?
This formula sits in the overnight treatment category which simply means it is designed to be applied as the last step of an evening routine and then left on while you sleep. Overnight treatments differ from rinse off masks or daytime moisturizers because they use the skins prolonged rest period to deliver a slow steady infusion of moisture and active ingredients without the interference of makeup, sunscreen or environmental stressors.
Isomers frames this product as a concentrated hydrator with peptide support. The mask combines humectants like glycerin and erythritol with emollient cocoa seed butter and shea butter extract to replenish water loss and reinforce the skins moisture barrier. A lab made diamond peptide complex is included to help signal collagen friendly activity which in theory softens fine lines and improves firmness. Antioxidant support comes from vitamin E and squalane while soothing agents such as aloe and allantoin aim to temper redness.
The brand recommends applying a generous even layer two to three nights per week after cleansing and serums then leaving it on until morning. Its intended audience is anyone dealing with dryness fine lines uneven tone or general dullness though it is particularly positioned for mature skin that needs extra resilience.
Did it work?
In the name of science I benched my usual overnight treatment for three entire nights before starting this trial so I could give the diamonds a clear playing field. Fourteen days feels like a fair window to spot any real change and I stuck to the instructions, smoothing on a generous layer after my serums every second evening. On non mask nights I reverted to a basic fragrance free moisturizer to avoid skewing the results.
Night one brought an immediate hit of comfort. The mask melted in easily and by morning my cheeks looked plumper and felt less tight than usual. That plush sensation lasted through the day which already put it a notch above many hydrating masks that fade by coffee time. The second application delivered the same cushiony effect but also left a faint film that required an extra rinse when I woke up. Not a deal breaker yet worth noting if you dislike any morning residue.
By the end of week one the most obvious gain was sustained hydration. Fine dehydration lines around my mouth appeared shallower and makeup went on more smoothly. However the promised glow stayed modest; my skin looked healthy but not exactly lit from within. I did appreciate a subtle calming of the minor redness that often flares along my jawline in winter.
Week two is usually when peptide claims either show up or stay in the marketing copy. I cannot say my forehead lines suddenly vanished yet their edges looked a touch softer and my overall texture felt refined, almost as if I had done a gentle exfoliation even though I had not. Importantly I did not experience breakouts or clogged pores which can happen when rich butters meet my combination skin.
Heading into day fourteen I took a hard look under harsh bathroom lighting. Hydration levels still ranked high and my skin felt strong and resilient which suggests the moisture barrier support is real. Radiance is where the results plateaued; there was improvement but nothing that made friends ask what I had done differently. In short the mask delivered solid moisture and a whisper of smoothing yet stopped shy of transformative.
So did it work? Yes on hydration and light line softening, partially on brightness, not so much on wow factor. I will finish the jar happily but I will not repurchase since my routine already includes humectant rich serums that achieve similar results. Still if your skin is drier than mine or you crave a reliably soothing overnight cushion this sparkling formula is worth a try.
Diamond peptide overnight hydrating mask’s main ingredients explained
At the heart of this formula are barrier friendly humectants that pull water into the skin. Hydrating glycerin, erythritol and squalane work in tandem to increase moisture content while meadowfoam seed oil acts as a lightweight emollient that helps seal everything in without feeling greasy. Aloe and allantoin bring a soothing element that calms winter redness and make the mask feel instantly comforting on contact.
The headline act is acetyl sh-pentapeptide-35 paired with micronized diamond powder. The peptide is a lab engineered chain of amino acids small enough to signal skin to kick up its own collagen support which can visibly soften early fine lines. The diamond is more showbiz than science yet it does create a subtle light diffusion effect so skin looks smoother even before the peptide has time to work.
Antioxidant protection arrives courtesy of vitamin E and cocoa seed butter. The butters, along with shea extract and cetearyl alcohol, give that plush overnight cushion but they sit mid range on the comedogenic scale meaning they can clog pores in very breakout prone skins. Dimethicone is often flagged too yet it is a larger molecule that tends to sit on the surface forming a breathable seal rather than blocking follicles. If you are highly susceptible to congestion patch test before slathering it on; everyone else should be fine.
The mask is free of animal derived ingredients so it is a comfortable choice for vegans and vegetarians. There is a touch of lactic acid which is generally considered gentle yet because pregnancy skin can behave unpredictably any expectant parent should still clear regular use with a healthcare provider first. Finally there is no added fragrance which lowers the irritation risk and makes the formula a good pick for sensitive noses.
Anything else to know? The preservative system leans on hydroxyacetophenone and 1,2-hexanediol which double as mild antioxidants and humectants so you are not trading safety for comfort. In short the ingredient list balances science forward actives with classic moisturizers delivering that eight out of ten performance without veering into either minimalist or maximalist territory.
What I liked/didn’t like
After two weeks of pillow testing here is the straightforward rundown of highs and lows.
What works well:
- Delivers lasting hydration that keeps skin comfortable through the next day
- Peptide and light diffusing diamond blend softens the look of fine lines without irritation
- No added fragrance so it plays nicely with sensitive or reactive skin types
- Leaves a subtly cushioned feel that makes morning makeup glide on
What to consider:
- Results focus on moisture and mild smoothing rather than dramatic brightening
- Rich butter base may not suit very oily or acne prone skin
- Price point sits in the mid premium bracket so value depends on how much hydration your current routine already provides
My final thoughts
After two weeks of night-time testing I am comfortable giving Diamond Peptide Overnight Hydrating Mask a solid 8/10. It excels at long-lasting hydration and offers a gentle nudge toward smoother, calmer skin. The improvements are meaningful rather than dramatic which suits anyone who wants reliability over miracle claims. I would happily recommend it to friends with normal to dry or mature skin looking for an easy plug-in treatment that will not clash with existing actives. If you have oilier or congestion-prone skin the rich butter base might feel heavy so steer toward lighter gel or serum formats instead.
Choosing an overnight treatment is a bit like choosing a mattress: you only realise how crucial it is once you have a good one. I have cycled through dozens of night creams and sleep masks over the years so I feel I gave Isomers a fair, head-to-pillow trial. Its strengths sit in barrier support and comfort; its limits are in radiance and line-plumping fireworks. For me that evens out to a confident four stars out of five, or in numerical terms an 8/10.
If you are shopping around here are a few alternatives I have used recently that might hit different preferences. Nocturnal Revive Cream by Deascal is an excellent all-rounder that balances hydration, gentle exfoliation and antioxidant support at a friendlier price and it suits every skin type I have tested it on. Advanced Night Restore by Medik8 leans into ceramide repair and feels lighter than the Isomers option yet still wakes me up to supple skin. Water Sleeping Mask by LANEIGE offers featherweight hydration for combination or oily complexions that dislike butters. Finally T.L.C. Framboos Glycolic Night Serum by Drunk Elephant pairs chemical exfoliation with soothing agents for those chasing overnight brightness rather than cushion.
With any of these choices remember a few basics: introduce one new product at a time, keep expectations realistic and monitor your skin’s response. I apologise for sounding like an over-protective parent but always patch test on the jaw or behind the ear before slathering a fresh formula across your face. Consistent use is key because the bouncy results you see after a fortnight will fade if the product is abandoned on a shelf. Skincare is a long game and your complexion will thank you for the patience.