Why pick
Whistle Aligners Ultra
Whistle Aligners Ultra are engineered with advanced 3-layer, dual-shell technology to deliver a more comfortable, consistent smile journey - from your first aligner tray to your last.
Globally Proven Zendura FLX™ Material
A internationally trusted tri laminate (three-layer) material with two hard outer shells for steady force and a soft inner core for added comfort.
Improved comfort
Up to 40% lower initial forces*, for a gentler, more comfortable fit.
Faster results
Up to 150% better force retention** for more consistent tooth movement throughout each tray cycle.
Improved Stain Resistance
Hard impervious outer layers resist staining and keep your aligner treatment unnoticeable.
Exceptional material
for an Ultra experience
Whistle Aligners Ultra are made using Zendura FLX®, the patented three-layer polymer engineered by Bay Materials in San Francisco and trusted by leading aligner systems worldwide.
MADE WITH
It runs on Zendura FLX, the patented three-layer polymer engineered by Bay Materials and trusted by leading aligner systems worldwide.
Three layers. Each made for a unique purpose.
Outer layer: The protection
Blocks stains. Resists wear.
Inner core: The cushion
Stores and releases steady, gentle force.
Inner layer: The grip
Locks onto your teeth so force lands exactly where needed
Three reasons that set
Whistle Aligners Ultra apart
Whistle Aligners Ultra are engineered with advanced 3-layer, dual-shell technology to deliver a more comfortable, consistent smile journey - from your first aligner tray to your last.
Higher Clinical Efficiency & Reduced Treatment Time
An aligner doesn't move your teeth by pushing hard once. It works through controlled and continuous pressure over time. Whistle Aligners Ultra helps maintain steadier pressure for efficient tooth movement and potentially faster treatment times.
Improved Comfort, designed for 20+ hour wear-time
Whistle Aligners Ultra use gentle and continuous pressure to move your teeth. Every 7-10 days, as prescribed by your doctor, you switch to a new tray that guides your teeth towards their next position. Whistle Aligners Ultra use gentle and continuous pressure to move your teeth. Every 7-10 days, as prescribed by your doctor, you switch to a new tray that guides your teeth towards their next position.
High Clarity & Stain Resistance
Clear aligners aren't visible to most people, making them easy to wear every day. But other materials can get dull with everyday consumption of tea, coffee and turmeric. Zendura FLX is engineered for lasting clarity. Its hard outer shell helps resist stains and everyday wear, so your aligners stay clearer from the day you put them in to the day you move on to your next set.
Advanced material meets expectional expertise
Every Whistle Aligners Ultra treatment case is also planned with the support of our in-house orthodontic team, working alongside your doctor to create a treatment plan around your teeth, your goals and your clinical needs.
A plan that fits
your smile
We start by understanding your smile
Your orthodontic needs, your goals for treatment, and your doctor's clinical assessment all go into the plan.
AI-powered Orthodontic Software maps the paths
Orthodontic software trained on millions of treatment data points, plots possible movement paths for each tooth.
Two Orthodontists review the plan
A design orthodontist and a planning orthodontist review the treatment before it reaches your doctor.
Your doctor refines it
Our team adjust the plan together until it is optimised for you.
Then your custom aligners are made
Only once the plan is ready do we make your custom aligner trays.
Whistle Aligner Reviews
Two aligners.
One decision
for your smile.
Whistle Pro is a proven aligner built on Flexi-3 and trusted by thousands of patients. Whistle Aligners Ultra builds on the same approach with Zendura FLX.
| Comparison Metric | Whistle Pro (Flexi-3) | Whistle Ultra (Zendura FLX) |
|---|---|---|
| Doctor-supervised treatment plan | ||
| Supported by in-house orthodontic team | ||
| Custom-made for your smile | ||
| Aligner material | Proven professional grade | Zendura FLX, patented tri-layer polymer |
| New-tray comfort | Gentle, consistent force | Engineered for even lower initial pressure |
| Force consistency through the wear cycle | Reliable force delivery | Super force retention, hour after hour |
| Stain resistance | Stain resistant, high clarity material | Enhanced hard outer shell for lasting clarity |
What's in the box
