Terviiix 1.75in Flat Iron Hair Straightener for Thick Hair - 11 Heat Settings
Sale price
$87.99
Regular price
$162.99
Skip to product information
4.7-inch extra-long 1.75" ceramic floating plates infused with argan oil and keratin, designed for thick, coarse, frizzy, and curly hair types. Glides through dense hair in one pass without snagging or pulling
80 million negative ions seal the cuticle for smooth, shiny results. 11 precise heat settings from 250°F to 455°F with LED display. Memory function recalls last temperature. Heats to 200°F in 20 seconds, reaches max in under 60 seconds
Worldwide dual voltage (100V-240V) with auto-adjustment for travel across US, Europe, and Asia. About 6.6ft 360° swivel cord prevents tangling during use. Auto shut-off after 60 minutes for safety and peace of mind
3D floating plate technology adjusts to hair thickness for even heat distribution from root to tip. Eliminates hot spots and reduces heat damage. Suitable for daily styling, straightening, and creating waves or curls
Includes ONYX GLEAM flat iron, heat-resistant silicone travel pouch, and user guide.
Engineered for thick, coarse, and curly hair with professional-grade technology.
Video credit by _therealcoko
Video credit by itssaleida_
Our extended 4.7-inch plates (
) allow you to grab wider sections of hair from root to tip in one go.
glide smoothly to condition hair. 80 million negative ions seal the hair cuticle, lock in moisture, and deliver smooth, frizz-free shine that lasts all day.
Auto-adjusts to hair thickness for even heat distribution.
Just smooth, consistent results from root to tip.
Our precision-engineered 3D floating plates
, ensuring every strand gets consistent heat and tension—
11 temp settings with memory function from
, you’re in full control of your style.
The digital display shows your precise temperature, and the 90W heating system reaches your selected
.
The included silicone heat mat wraps right around the plates — store it the second you're done.
means this straightener works in any country.
The
keeps your workspace tangle-free, and the
feature gives you peace of mind.
so you're ready to go from day one.
Does this flat iron work on thick, curly, or coarse hair?
Yes—it's built for it. The 1.75-inch wide, 4.7-inch extra-long plate covers more hair per pass, and 11 heat settings up to 455°F handle even the thickest, coarsest textures with fewer passes and less heat exposure.
What temperature should I use for my hair type?
Fine or color-treated hair: 250–350°F. Normal hair: 350–370°F. Thick or coarse hair: 380–430°F. Very coarse or tightly coiled: 430–455°F. Start low and go up if needed. The 11 digital settings give you way finer control than typical 3–5 heat options.
Does this flat iron damage hair?
Less than most. 3D floating plates prevent snagging, smart sensors keep heat steady with no hot spots, and argan oil plus keratin infused plates condition hair with every pass. Always use a heat protectant for best results.
Can I curl my hair with this flat iron?
Yes. The 4.7-inch extra-long plate lets you curl wider sections in one pass for more natural-looking waves. Rounded edges and smooth ceramic glide make it easy—just twist your wrist. Great for beach waves, loose curls, or flipped ends.
What makes this different from a regular flat iron?
Three things: the 4.7-inch plate is 30% longer than standard, so you finish faster. 80 million negative ions seal the cuticle—no frizz, just shine. And 455°F max heat handles stubborn, coarse hair that lower-temp irons can't straighten.
For years, women with thick, coarse, and textured hair have been forced to use styling tools designed for someone else. Narrow plates that take forever. Short plates that miss half the strand. Gaps that leave uneven results.
Terviiix was founded with a single mission: engineer professional styling tools purpose-
— from the ground up.
TOO NARROW, TOO SHORT — Standard plates (1" x 3.5") force you to take tiny sections, turning a 20-minute job into an hour.
PLATES THAT DON'T FULLY CLOSE — Many wide-plate irons leave gaps between the plates, causing uneven heat and missed strands.
HEAT WITHOUT CARE — High temperatures without moisture protection leave hair dry, brittle, and damaged over time.
ARM FATIGUE IS REAL — Repeated passes on thick hair means sore arms and wasted time, every single wash day.
Whether you're rocking natural curls, protective styles, or going for a sleek straight look — the ONYX GLEAM handles it all.
The wide plates and high heat are specifically engineered for thick, coarse, and textured hair that other flat irons struggle with.
Type 3A-4C hair, natural hair, thick hair, coarse textures, and anyone who wants salon results at home.
EXTRA-LONG 4.7" PLATES — 30% longer than standard irons. Grab more hairfrom root to tip in every pass. Less time, less fatigue.
ZERO-GAP — Precision 3D floating plates achieve 100% plate-to-plate contact- no gaps, no missed strands, nouneven heat.
ARGAN OIL & KERATIN INFUSION — Nutrients baked into the ceramic surface activatewith heat to seal cuticles, delivering salon-grade silkpress results at home.
8M NEGATIVE ION GENERATOR — Neutralizes static and frizz at the molecular level fora smooth, glass-like finish.
Terviiix 1.75in Flat Iron Hair Straightener for Thick Hair - 11 Heat Settings
Sale price
$87.99
Regular price
$162.99