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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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Stay afloat, stay fearless — your invisible lifesaver on every adventure!

FEATHERLIGHT COMFORT - Crafted with tear-resistant polyester oxford for barely-there wear all day.
BUILT TO LAST REUSE - Equipped with a 33g CO2 cylinder and green clip for easy rearming and washing.
DUAL INFLATION OPTIONS - Manual CO2 inflation plus a 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 and securely.

The Eyson Inflatable Life Jacket is a high-visibility, manual inflation vest designed for adults up to 330 lbs. It inflates rapidly within 2-3 seconds using a 33g CO2 cylinder, offers 150 newtons of buoyancy, and features a durable yet lightweight polyester oxford cover. With adjustable straps and a backup oral inflation tube, it combines safety, comfort, and reusability for paddlers and boaters who demand reliable protection without bulk.

Specifications

ASIN	B08PZ8J1RK
Additional Features	Adjustable, Inflatable, Lightweight
Age Range (Description)	Adult
Age Range Description	Adult
Best Sellers Rank	#550,810 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #982 in Life Jackets & Vests
Brand	Eyson
Brand Name	Eyson
Closure Type	Buckle
Color	Black
Customer Reviews	4.4 out of 5 stars 45 Reviews
Fit Type	Comfort
Included Components	Life Jackets
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	Polyester
Personal Flotation Device Type	Life Jacket
Size	One Size
Special Feature	Adjustable, Inflatable, Lightweight
Strap Type	Adjustable
Warranty Description	1

Reviews

R**S

19.03.2025

R**W

12.04.2024

S**.

29.06.2024

F**M

6.12.2024

X**G

22.07.2024

W**M

5.06.2024

W**G

21.05.2021

M**B

1.08.2021

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