does this come with a CO2 arming cartridge?

No it does not. You have to purchase the Co2. Only place I could find was on Amazon.

Are these easy to swim in? Will they affect buoyancy? I’d like to use this while spearfishing.

I don't think they're meant to use for swimming, as they will inflate within a few seconds of being in the water.

Can this pfd be used for offshore sailing? there is a d ring on the pfd can be a harness to clip the tether to but this has 1 instead of 2 d rings

It appears that you could clip a safety line to the D ring. I however wouldn't use this for offshore sailing as it's a manual inflate (you have to pull the self-inflate tab vs. being water activated) model. If you are partially / fully incapacitated when you go into the water it's not going to inflate and won't do you much good. I bought the manual inflate version as I use it when flying and if I ditch into water, presuming I survive that, I don't want it to inflate while I'm still inside the plane and impede my egress. Also, I'm not sure that the life vest would be secure enough and not potentially come off / fail as would not be the case with a true safety harness.

Eyson Inflatable Life Jacket Life Vest Highly Visible Manual Adults

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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¥93003

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In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Stay afloat, stay fearless — your sleek safety sidekick on every water journey!

FEATHERLIGHT COMFORT - Crafted with tear-resistant polyester oxford for barely-there wear all day.
BUILT TO LAST REUSE - Reusable with a 33g CO2 cylinder and easy air-dry design for endless adventures.
DUAL INFLATION OPTIONS - Manual CO2 inflation plus backup oral tube for fail-safe buoyancy.
INSTANT SAFETY ACTIVATION - Inflates in just 2-3 seconds to keep you afloat when it counts.
UNIVERSAL FIT MAXIMUM SECURITY - Adjustable chest strap fits most adults comfortably up to 330 lbs.

The Eyson Inflatable Life Jacket is a high-visibility, manual inflation vest designed for adults, combining rapid 2-3 second inflation with durable, lightweight polyester oxford fabric. It supports users up to 330 lbs with 150 Newton buoyancy, features an adjustable chest strap for a secure fit, and includes both CO2 and oral inflation options. Reusable and easy to maintain, it’s the perfect blend of comfort, safety, and reliability for paddlers and boaters alike.

Specifications

ASIN	B08PZ8J1RK
Age Range (Description)	Adult
Age Range Description	Adult
Brand	Eyson
Brand Name	Eyson
Closure Type	Buckle
Colour	Black
Country Of Origin	USA
Customer Reviews	4.4 out of 5 stars 40 Reviews
Fit Type	Comfort
Item Type Name	Life Jackets & Vests
Item Weight	1.9 Pounds
Lining Description	Neoprene
Manufacturer	Eyson Lifesaving Equipment
Manufacturer Part Number	ES639717-150M-BLA
Material	Neoprene
Material Type	Neoprene
Maximum Weight Recommendation	150 Kilograms
Minimum Weight Recommendation	330 Pounds
Outer Material Type	Polyester
Personal Flotation Device Type	Life Jacket
Size	One Size
Special Feature	Adjustable , Inflatable , Lightweight
Special Features	Adjustable, Inflatable, Lightweight
Strap Type	Adjustable
Whats In The Box1 - Whats In The Box3	Life Jackets

Reviews

R**S

Very nice vest

Great product made well shipped packaged well yes I like I am going to order another one 👍👍👍👍

19.03.2025

R**W

Great Purchase

I like the heavy construction and metal buckle Great purchase I purchased 3. I will buy more Fast delivery I am happy

12.04.2024

F**M

Ok jacket

3 stars for me. The metal buckles are a little annoying. Other than that, well built. Thanks

6.12.2024

H**E

Nice, almost like the expensive counterpart brand but not USCG cert.

Nice, should be priced a lot less. Almost like the counterpart brand and not USCG cert. I like the harness buckle but still need more improvement. Nylon material use is thin and seams could ripped upon inflation. Nice Stainless harness buckle but could ripped off with it's light duty construction. For the price, could be ok for light duty usage but could be improved. Not USCG Cert

22.07.2024

S**.

Life vest

Great investment

29.06.2024

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¥93003

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.