The latest SiTech glove system has a rotating mount that makes donning very much more straightforward. Here's a review that I did for Diver Mag (UK). It will be on www.divernet.com at the beginning of April.
Si Tech Glove Lock
I admit to being one of those people that gets a pile of bits from Ikea, follows the instructions implicitly, and still ends up with a wardrobe the shelves upside-down. With this in mind, it was with some trepidation that I fitted the Si Tech Glove Lock system for use with dry gloves to my otherwise excellent Aquion drysuit.
I say it’s excellent because it has always kept me perfectly dry and I was aware of the risk I was taking by tampering with its watertight integrity. In fact I needn’t have worried because I wasn’t.
This Glove Lock system from the Swedish manufacturer Si Tech, is fitted to the latex wrist seals of the drysuit in such a way as to leave them completely functional. You slide the appropriate size ‘spanner ’ ring down (several colour-coded sizes are supplied to use with different thicknesses of material) through the sleeve of the drysuit and squeeze it up inside the wrist seal, stretching it evenly round the ring as you go. The drysuit-fitting half of the Glove Lock system squeezes on to it. Naturally it involves a bit of effort but the SiTech instructions tell you to test for a good fit by pulling on the ring against the suit sleeve.
SiTech supplied me with a set of heavy-duty PVC gloves and these are fitted in a similar way by choosing the right size ‘spanner’ ring and forcing the glove ring into it, being sure that the fit is even all round and that there are no wrinkles. Again, you test for a good fit by pulling the ring against the glove. All well and good, and after a short time trying to make head or tails of the rather brief Ikea-like fitting instructions I managed to get everything neatly assembled and to my liking.
So what is the advantage over other dry glove ring systems? The suit is donned as normal with some soft fluffy liner gloves. Immediately before diving, the dry gloves are put on. The big difference is that they are not limited in the way the mounting-ring has been fitted because you can rotate them to suit the orientation of your hands. A big rubber-covered locking ring rotates about the suit ring to keep the gloves in place and a captive O-ring keeps the joint watertight.
I found I still needed help fitting the second glove just as I have done with every other dryglove system I’ve used. I found that the rubber covered locking ring was not as easy to rotate as the one that Stig, the boss of Si Tech, had demonstrated to me previously. The captive O-ring probably needed lubricating with silicone grease but I was damned if I could get either of the drysuit half of the rings apart to get access. I was too frightened of breaking them.
Something that everyone who uses dry gloves with their own wrist seal soon discovers is that under the pressure of depth the glove is crushed up and with it the insulation of the liner glove. Your hands may stay dry but they soon get cold. Hands in dry gloves that use the same internal air-volume as the rest of the suit can be kept warm by holding an arm up and letting air migrate.
Some of you will be suspicious of this way of doing things because, should you damage your gloves, your drysuit will gradually fill with water – another way to get cold quickly – so it’s not for wreckers or anyone likely to badly tear a glove.
Deeply suspicious of my own ability to fit anything to a drysuit and still stay dry when submerged, it suited me to leave the drysuit wrist seals intact and functioning. This in effect meant that the dry gloves had their own internal air space with the resultant loss of insulation at depth. (See picture.) Not only that but if I wasn’t careful the gloves would balloon with too much air in them to begin with, making me feel like I had so little dexterity I could hardly handle my pressure gauge.
Then Jimbob suggested I put the woolly liner gloves on before pushing my hands down the sleeves of my suit so that water-sealing ability of the inner wrist seals was compromised. That meant that the gloves became part of the same volume of air as the rest of the suit. If I was to accidentally puncture a glove I could simply pull it off so that the wrist seal settled back against my skin, sacrificing my hand’s insulation in order to mitigate the effect of a possible flood. It didn’t make the seals very tight on my wrists as I might have expected and I opted to use the gloves and the Glove Lock system this way in future. I’m not too old to learn something new.