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5 mm wetsuit buoyancy?

Discussion in 'Exposure Suits' started by Subcooled, Jul 18, 2016.

  1. Subcooled

    Subcooled Assistant Instructor

    # of Dives: 200 - 499
    Location: Finland
    How much weight does a 5 mm full length adult size wetsuit need to sink?
    6 lbs? 10 lbs? 14 lbs? I need a rough guide only.

    I know how much weight I need to offset the buoyancy of my lungs, but neoprene is unfamiliar territory.
  2. tbone1004

    tbone1004 Technical Instructor ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    rough rule is 3x the dry land weight for neoprene IIRC
    RLima and Subcooled like this.
  3. DevonDiver

    DevonDiver N/A

    # of Dives: 5,000 - ∞
    Location: Subic Bay, Philippines
    What size adult? There's a big difference between the amount of neoprene in a XS and an XXXL wetsuit.

    I recently tested my new XL 5mm full suit. It took 16lb of lead to sink it in a mesh bag. I added 4lbs because I was diving double AL80s. Total weight on first dive with the suit was 20lbs. That seemed enormous because I'm used to using only 4lbs with my (very compressed) old 3mm suit.

    I've already dropped 8lbs. Now diving the suit with only 12lbs of lead. I expect that to drop further as the suit 'beds down' over an initial 20-30 dives. I reckon I'll need only 8lbs once the suit is fully worn in after a stint of deeper tech dives.
    Subcooled and Skulmoski like this.
  4. redacted

    redacted Guest

    Both of my xxl's took 14 lb.
    Subcooled likes this.
  5. Skulmoski

    Skulmoski Barracuda

    # of Dives: 100 - 199
    Location: Gold Coast, QLD
    With Yamamoto neoprene, you need more than the average amount than for non-limestone neoprene.

  6. Wingy

    Wingy Solo Diver

    # of Dives: 0 - 24
    Location: Perth West Aust.
    Glad I saw this thread - I have been using enough weight to sink the Coolidge with a new (12 dives) aqualung aquaflex even in XS size.i did two dives just over 30m today and am using 2kg more than I've ever used....I love it but I'm floaty
  7. ibj40

    ibj40 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: I just don't log dives
    Location: Texas
    I am 5'10", and weigh about 170 pounds. I dive a BARE Velocity 5mm full suit, and use 18 pounds of weight.
  8. Freewillow

    Freewillow Divemaster

    # of Dives: 500 - 999
    Location: Brussels
    Important to mention salt or fresh water and type of cylinder used. This "sounds" on the high side, but it varies with environment.
    Last edited: Jul 19, 2016
  9. ibj40

    ibj40 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: I just don't log dives
    Location: Texas
    Sorry about that. Always salt, primarily Caribbean, and usually Aluminum 80's, and it works for me, just fine. I might be able to trim off a couple of pounds, but would prefer to be comfortable and stable.
  10. oly5050user

    oly5050user Dive Travel Professional

    # of Dives: 5,000 - ∞
    Location: Westchester NY
    You are listed as a asst instr.. Simply do a proper buoyancy check...just as taught in a PADI ow course in confined water module two, and during the ow training dives. Every environment is different. Every gear selection (wet suit,bcd,regulator system, etc) is different.
    tridacna likes this.

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