SKU: 90995986530

Mason Black Optical

Sale price$134.10 Regular price$149.00
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Ships within 48 hours · Estimated delivery Aug 4 - Aug 9

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Description

Mason Black OpticalMason Black Square Shape Frame Color: Black Lens Color: Demo lenses 2 Year Warranty Technical Information: Hand Polished Width Nose Gap Height Measurements of this pair: 145 22 48 mm Hinge: Five barrel Lenses: Flat base 0 Front thickness: 4. 8 mm Temples thickness: 3. 5 mm Lenses Technology: CR 39 Custom Made Lenses CR 39 is made by polymerization of diethyleneglycol bis allylcarbonate (ADC) in presence of diisopropyl peroxydicarbonate (IPP)

Mason Black | Square Shape

- Frame Color: Black
- Lens Color: Demo lenses  
- 2-Year Warranty

Technical Information:

Hand Polished
Width-Nose Gap-Height Measurements of this pair: 145-22-48 mm
Hinge: Five-barrel
Lenses: Flat - base 0°
Front thickness: 4.8 mm | Temples thickness: 3.5 mm

Lenses Technology:

✓ CR-39 Custom-Made Lenses

CR-39 is made by polymerization of diethyleneglycol bis allylcarbonate (ADC) in presence of diisopropyl peroxydicarbonate (IPP) initiator.
"CR-39" is an abbreviation of Columbia Resin 39. CR-39 has the highest Abbe value of any lens. An Abbe value defines the chromatic aberration of material, and this effect is generally more noticeable in peripheral vision than when looking through the center of a lens. Resin raw is injected into lenses mould. After that, the anti-scratch coating is applied.

  • Anti-scratch technology.
  • Unique colors, with over 4+ tests to achieve the final result.
  • Gradient colors with smooth transition.
  • All DE products have V-Groove (Removable Lenses - Technical feature that allows lenses to be removable, in order to add prescription etc)

+ Metal Parts.

Metal Core wire with IP plating that prevents oxidation and wear.

✓ 100% UV Protection.
The lenses we use, have a UV protective coating with maximum filtration against harmful sun rays.

✓ Lenses Category: 3.

The bigger the category number of lenses, the better. Category 3 in lenses, is considered better than categories 2 & 1. This is because they provide extra protection from both visible and UV light. These lenses allow less than 20% of visible light to penetrate the lens. This means that they will block out 80%+ of light. Category 3 lenses are considered some of the best lenses in the optical industry.

Acetate Technology:

✓ Italian (Mazzucchelli) Acetate.
Our Acetate Materials are coming from some of the biggest acetate factories in Europe. Fabricated from wood pulp and cotton.

Mazzucchelli 1849, is an Italian Company based in Castiglione Olona, and is a worldwide leader in the manufacturing and distribution of sheets made of Cellulose Acetate, polymer of natural origin, traditionally used in the production of optical and sunglass frames. Cellulose acetate is a modified natural polymer. To obtain Cellulose Acetate Mazzucchelli starts with the selection of renewable sources such as certain varieties of trees and cotton linters. From these sources the purest part of the cellulose is extracted which is subsequently treated with Acetic Anhydride and transformed into Cellulose Acetate powder.

✓ Engraved DE logo on the temples.
Every pair has the engraved logo, product name, and measurements on both temples.

Comes with a luxury box, eco-leather case, and cleaning cloth.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 90995986530

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4.2 ★★★★★
Based on 8 reviews
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Product Reviews
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Verified Purchase
Daniel P
Los Angeles, US
★★★★★ 5
Works great and easy to use
Color: Black
I feel like I’ve finally found a decent milk frother! I’ve gone through (or returned) several models over the last few years, but this one has a different design and hasn’t frustrated me like the others. It has plenty of power to froth milk, foam quality is good, heating is good. I checked the temperature a few times, since a few reviews were critical of that, and it was within a degree or two of what I’d set, so I’d say it’s good! I appreciate that it remembers the last settings so most days are a 1-click operation. But even changing the settings is easy - easier than others I’ve used while having more options.
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Reviewed in the United States on April 26, 2026
P
Verified Purchase
Payton
Battle Creek, US
★★★★★ 5
Best addition to our coffee bar
Color: Black
BEST milk frother we've owned. It is on the larger size but worth it. I love that there are multiple temperature settings. It is easy to use and figure out. The frother spins inside of the stainless steel cup and is magnetically attached inside so it does not come off easily. We use agave for sweetener and being able to throw the cup into the dishwasher to clean off residue has been the biggest plus of this frother. Highly recommend. Worth the cost.
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Reviewed in the United States on June 4, 2026
T
Verified Purchase
Trekkintheplains
Carnegie, US
★★★★★ 5
Cute, functional, works great!
I LOVE this thing!! It froths the half and half for my coffee and cream for my tea so beautifully. It's fast, and easy to use and clean. Really adds to my morning routine to be able to choose a temperature and froth level to my coffee creamer. The color is so pretty and both it and the style fit right in with my kitchen decor. I've been using it for several months and haven't had any issues to far. Great item! I was afraid it would just be more clutter and gadgets I didn't need taking up counter space, but it fits right in next to my coffee maker, and I truly do use it every morning. It makes my coffee even more enjoyable, believe it or not. Love it!!
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Reviewed in the United States on April 10, 2026
M
Verified Purchase
Melissa Tucker
Draper, US
★★★★★ 4
Solid purchase
Color: White, Color: White
I have used it often, basically daily. I love how it has a magnet stirrer and therefore is quiet. I like the stainless steel aspect. It does heat up well. It can store two regular mugs of beverage or maybe 3-4 mugs of froth. It is lightweight but doesn’t feel cheaply made- good enough quality. The froth is great- I have no complaints. I had to learn the hard way that non-homogenized milk gets grainy- weird and icky. I wish it was a little more frothy on the matcha side of things but I still use it. Also, I wish for things like hot chocolate that it got hotter. It goes to 160 on the machine but it doesn’t feel that hot when you drink it. I haven’t measured the temperature of the drink yet but it isn’t hot hot.
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Reviewed in the United States on January 2, 2026
M
Verified Purchase
Metsa Lintu
Alexandria, US
★★★★★ 5
It delivered on more levels than I imagined or expected
Color: White
EDIT: I've used this frother pretty much daily, sometimes more than daily, since ordering it, and it has performed very well. I make turmeric/ginger/pepper milk most nights. The way this frother performs for that use astounded me. I bought it for coffee/cocoa/mushroom drinks, then while waiting for it to arrive realized it might work with the "golden milk." First, the little frother uses a closely/precisely applied heat drawing 550w. The thick steel pot nestles down into the heating base, and the cover fits nice and snugly. So I'm not heating an entire thick saucepan perched atop an entire stove burner (1,000-1,500 w), with all the escaped heat that involves. Second, I'm not standing there with thermometer in hand, diving into the open pan of heating milk to find that perfect sweet spot around 150-155...while constantly stirring and making sure not to let it boil over. Because, third, the little frother takes care of that part, with the thermostat auto shut off. Fourth, it whisks the powders smoothly in. Manufacturer suggests starting the whisk movement in the milk, then adding the powders. They did collect a bit in the low vortex around the stem of the little assembly that holds the various whisk/stir/froth blades, but I just stuck a spoon handle in there carefully, and it redistributed easily around the magnetic-driven stirring assembly. And finally, omigosh, the lovely velvety texture! Since these spices express best with extended warming, I'm making one batch, heated and frothed to 160F, then follow that with just milk frothed to 140. While the second batch is running (there's a cool down pause in the process, hastened by rinsing the pot exterior in cold water and of course drying it before putting it on the base), the first batch is steeping the spices...so the combined result is perfect. EDIT: It did its job much faster than I expected (minutes). So I tested it as promised on my "solar generator" backup unit. My thought was that this would make my usual most efficient option for heating milk in those conditions the second most efficient: open saucepan atop a multi-watt-level portable induction cookplace on the 600w setting. And with much less cleanup at a time when water is scarce (electric well pump). We had a power outage here last week. Yep, the 550w frother ran on a Jackery 2000 for the few minutes it took to heat/froth milk--no trouble whatever and hardly put a dent in the charge. WOW. (Technically speaking it could run continuously, continuously heating, for over 3 1/2 hours on a full 2000 kWh charge.) EDIT: This isn't a reduction in stars, just an observation. The frother "tree" assembly that does the business of stirring/whisking/frothing--I thought to order a spare in the event of damage to the original. They are very hard to find online. Maestri House lists the replacement part as "out of stock." Also out of stock, replacement pot and lid. This might be a concern to some considering the tool. But it seems to be well made and I hope gives long service. EDIT: As of May 2026 the little frother is still working exceptionally well on a nearly daily basis. I purchased it in October of 2025, so that shouldn't be a surprise...but just sayin'. :^>
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Reviewed in the United States on October 27, 2025

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