Here's what you need,
www.heatedwetsuitreviews.com, so you can be swimming the icy cold lake from Patriots Day, April 19, to Christmas! I just ordered the RipCurl H-Bomb heated wet suit vest from the
www.swimoutlet.com for about $245, reg price 299, and am waiting for it to arrive. It is powered by a 7.4v lithium rechargable battery. The size xxl is about $225....and that was maybe the better size ....I dunno?
Could be a big waste, in which case I'll return it, or it may be good for swimming and sailing a small, wet sailboat, a 12' Laser Pico ........ time will tell? Sounds too good to be true...... but I cannot resist giving it a try out.
What's next ...... a SeaDoo SeaScooter Pro (big enough for adults, w/ two batteries) ..... sort of like an in-the-water jet-pak with an enclosed propeller pulling you forward at about 1 to 1 1/2-mph ......... as seen on Sea Hunt, back in July, 1959
www.youtube.com/watch?v=KcXtyKzHpUA with Mike Nelson......aka the late, great LLoyd Bridges .... and available from Parafunalia in Gilford, NH for about $259 ..... list price 299....... the Seascooter Dolphin, about $199 is less powerfull, one battery, is smaller, less powerfull, just one battery, made for kids. As far as I know, these do not require a New Hampshire boat registration, but am not too sure about this?
It looks like the two swimmer/divers in the you tube are both wearing a weight belt.....wonder how much weight is needed to do this with a mask and snorkel to create a small amount of negative buoyancy, while still wearing a swimmers belt at the same time? Is that how it works?
From the water temperature page, today's June 19, 2017, U S Geologic Survey info buoy, at the Weirs, water temp is 64.5 degrees, from earlier today, which is definitely a little cold, maybe a lot cold, for swimming, especially with no sunshine today. But, with a heated wet suit vest ....... who knows ..... time will tell?
As of 6:42-pm, the graph for the USGS Winnipesaukee buoy, afloat at the Weirs Beach swim area rope line, shows the water temp at about 65.25-degrees....so it's gone up 3/4-degree since this morning.