Thermal Fusion Undergarment

When I ordered my Fusion Bullet package in late March, 2013, I had hoped to order the NoZip undergarment, but at the time (and at time of this writing) it seems to have disappeared and become unavailable. The folks at DRIS suggested I give the ThermalFusion a shot, so I went for it.

I've been able to dive it twice so far, and the experience has been great. I don't have anything really to compare to (other than diving wet) but I'm glad I made the change. In 43°F water I'm warm. This plus the Mk3 socks and the only places I feel cold are my hands (wet gloves) and face.

Gearing up, I've been lucky so far that surface temps have been mild (high 60's) but despite my natural tendency to sweat, the fabric does an awesome job of wicking away moisture form my skin.

On my first dive I managed to have a small flood due to a loose inflator valve. I noticed that the water was there, but didn't feel "wet". I ended the dive shortly after that anyway, but didn't feel like I was in any danger due to water intrusion. I actually had to her it bubbling when I added air to confirm that I in fact had water in the suit. After the flood, a quick trip thru the dryer and they were ready to go again the next day.

Fit wise, I have pretty large calves (19" diameter) and that's the only place I can feel them tight (4x sized garment). Rest fits like a dream. In my case, vs diving dry I had to add a bunch of lead. I'm sure I'll lose some of that as I get more accustomed to the suit, but right now I'm adding 28lbs over what I use when diving a 5mm wetsuit.

Now I just need to figure out what to go to when the water warms up :)

An OK suit. It will still constrict to the point of uncomfort. I would not buy this suit if I had a chance to try it on prior. Buyer beware.

I purchased the thermal fusion to replace a Bare Super Hi-loft that was ill fitting in the arms. I used this suit on a number of dives down to the mid 40s this past weekend and it worked flawlessly. I was plenty warm and the added flexibility that this suit provides is it's greatest asset. It does take a mintue to adjust the underlayer around your ankles and lower legs, but after that it is no different than putting on any other undergarment. The only thing I noticed over my Bare suit was that I needed to add about 4 additoinal lbs to my rig. As always, DRIS was quick with delivery and I had my suit in plenty of time for my trip. Overall impressions are very positive and I would recommend this undersuit.

This undergarment is awesome!!!! It provides just the right amount of insulation but also does not make you overheat during surface intervals. I had it on for 45 minutes at 70 deg and was sweating slightly before getting in water, but that is expected. Then got into 50 deg water and stayed nice and warm the whole time, and never noticed a decrease in mobility. I wore just a MK0 the day before for one dive just to see the difference in mobility and there was very little if any difference that I noticed. I would definately recommend this undergarment and once again cudos to DRIS for the excellent customer service they continue to provide.

Got this with my Fusion Bullet at the local dive expo. It's comfortable, flexible, and warm. However, just like a previous reviewer I've already torn a seam, but on my left wrist. This has two layers of fleece that are only sewn together at the neck, wrists, and ankles. Not sure why they chose that design, but it can make it a pain to get situated correctly. I have the most issues at the calves and wrists. I have to reach inside, grab the inside layer, and tug hard. I keep waiting to hear stitches popping while I'm trying to get bulges and folds out.

It's also too thick to fit inside the wrist rings for my replaceable seals, so to get my wrist seals in place I have to unhook the thumb loop, and push the sleeves up to my forearms with the rings. not a big deal, but it's annoying to keep needing all the yanking and tugging. It usually leaves me dripping with sweat when it's warm out.

Other than that, it's been good. I don't need any more lead with it than I needed with my wet suit, and it keeps me plenty warm in Pac NW waters.

I also bought this to go along with my Fusion Bullet. The undergarment is extremely warm. I dive 45-55 degree water and I have not been cold at all. It wicks moisture extremely well, inside is always bone dry. The garment IS flexible as advertised, however I must warn that you need to make sure you have the undergarment on correctly otherwise you will rip it at certain areas. I've already ripped the stitching in the crotch area and near the end of the zipper, fixed them with a sewing kit. I feel that Whites should reinforce these areas a little more. Also, you shouldn't rush while donning to avoid bunching the inner layer in the calf areas. I don the underment just like the fusion (pull up the inner layer first and then the outer later). Other than that, its extremely comfortable, warm, and an awesome combination with the fusion drysuit.

I purchased this undergarment to use with my Fusion Bullet at the recommendation of the DRIS staff. My initial impression was that it seemed well constructed and fit very similar to the Fusion Dry Suit. I used it for the first time during my rescue diver course. I spent around an hour and a half in water in the mid 40's, and I was warm the entire time wearing this undergarment with a base layer. I also did not notice any major loss of flexibility while wearing this undergarment. Thank you to DRIS and Whites for a great product.