Where are these made?

I searched for info on this company, it appears they are a dental lab located in Ft Myers, FLA. That's why orders can take 3-5 days to arrive (5 for the West coast). On back of box for the pictured tray set, is the "Made in USA" logo, complete with American flag. Zoom in to see clearly.

Are they big enough for an adult?

They work fine for adults & will not cover molars. These are whitening trays. They are only meant to be used to whiten teeth and worn for a short period of time. If you need a nightguard, don't buy these. :)

which is top and bottom?

They are universal. - it does not matter

How long do the directions say to leave trays/gel in your mouth?

If you mean, while moulding them to your teeth: Just until they cool and have set to your teeth shape. If you mean when they're loaded with bleach: I wear mine about 60 minutes.

Deliver to EGYPT

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Whiter Smile LabsTeeth Whitening Trays - BPA Free, Thin Moldable Mouth Tray Fits Perfectly to Each Tooth - 4 Trays

Whiter Smile LabsTeeth Whitening Trays - BPA Free, Thin Moldable Mouth Tray Fits Perfectly to Each Tooth - 4 Trays

Product ID: 635376499

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Details

Brand
Whiter Smile
Product benefits
Whitening
Item form
Tray
Number of items
1
Material Type Free
Bisphenol A
Included components
4 x Mouth

🦷4 custom-fit trays for upper & lower teeth

♻️BPA-free, safe thermoform material

🛠️Thin yet durable moldable design

Description

✨ Smile Brighter, Shine Harder 🦷

SAFE NON TOXIC - Crafted from BPA-free materials to keep your oral care routine clean and healthy.
OPTIMAL THICKNESS - Balanced thinness ensures comfort without compromising durability or effectiveness.
AT HOME CONVENIENCE - Professional-grade whitening results without the hassle or cost of dental visits.
PRECISION CUSTOM FIT - Mold trays perfectly to your unique smile for maximum whitening impact.
COMPLETE WHITENING KIT - Includes 4 trays—enough for multiple sessions targeting both upper and lower teeth.

Whiter Smile Labs offers a set of 4 BPA-free, thermoform teeth whitening trays designed for a custom fit on both upper and lower teeth. These trays balance thinness and durability to provide comfortable, effective at-home whitening sessions tailored to your unique dental contours.