Listing reads the same dimensions for L & S......can I 'assume' the 4.7" is the large size dimension?

Yes it’s the 4.7. I have an average to slightly smaller than average face/head for an adult male and it was a great fit, but could adjust either way. I would recommend large for any average adult.

do you breath in through your nose mouth or both and when you dive do you blow out through your mouth or nose?

You can breath though your nose or mouth. But aware you can't dive. Your O2 is VERY limited if you go under the water. This is a snorkel mask, not diving equipment.

What is the diameter of the round connection? please provide od and id.

The male piece on the mask has an outside dimension of 1.25". The detachable snorkel tube has an inside diameter of 1.25".

Can i wear glasses with mask?

No you cant. It would break the seal and cause leaking.

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Greatever G2 Full Face Snorkel Mask with Latest Dry Top System,Foldable 180 Degree Panoramic View Snorkeling Mask with Camera Mount,Safe Breathing,Anti-Leak&Anti-Fog,for Kids&Adult

Greatever G2 Full Face Snorkel Mask with Latest Dry Top System,Foldable 180 Degree Panoramic View Snorkeling Mask with Camera Mount,Safe Breathing,Anti-Leak&Anti-Fog,for Kids&Adult

Product ID: 360459562

Details

Brand
Greatever
Colour
Black
Lens material
Polycarbonate
Lens type
Single Lens
Material
Polyurethane

🌊180° panoramic view

🎥removable camera mount

💨advanced dry top system

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¥21705

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌟 See More, Breathe Easy, Snorkel Smarter!

DIVE INTO CLARITY - Experience distortion-free underwater views with premium HD PU resin lens and a full 180° panoramic perspective.
BREATHE LIKE A PRO - Innovative G2 dry top system with dual-channel exhaust and 1.26-inch snorkel diameter ensures smooth, leak-free breathing.
CAPTURE EVERY MOMENT - Integrated removable camera mount lets you effortlessly document your underwater adventures in stunning detail.
FOG FREE EXPLORATION - Dual-pane insulating lens design minimizes fogging, keeping your vision crystal clear no matter the water temperature.
FAMILY READY EASY CARE - Foldable design with detailed disassembly for thorough cleaning, perfect for kids and adults who value durability and hygiene.

The Greatever G2 Full Face Snorkel Mask redefines snorkeling with its expansive 180° panoramic lens made from high-definition PU resin, ensuring a distortion-free underwater experience. Equipped with a removable camera mount, it lets users capture every breathtaking moment. Its patented G2 dry top system features a wide 1.26-inch snorkel and dual-channel exhaust valves for effortless, safe breathing. The mask’s dual-pane anti-fog design maintains clear vision across varying water temperatures. Designed for both kids and adults, its foldable, easy-to-clean structure supports long-term use and family adventures, backed by 24/7 customer service for a premium snorkeling experience.

Specifications

ASIN	B094ZCYJ78
Age Range Description	9+ years old
Best Sellers Rank	#6,344 in Sporting Goods ( See Top 100 in Sporting Goods ) #30 in Diving Masks
Brand Name	Greatever
Closure Type	Buckle
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (13,964)
Included Components	Mask
Item Type Name	snorkeling-diving-packages
Item Weight	789 g
Lens Material	Polycarbonate (PC)
Lens Type	Single Lens
Manufacturer	Greatever
Manufacturer Part Number	GRESM01
Material Type	Polyurethane Resin,Silicone,Tempered Glass
Model Number	GRESM30
Strap Type	Detachable

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