In your drywear descriptions, what do you mean when you say
“semi-dry”?
First let’s talk about what makes drywear “dry”. All
drysuits, drytops and drypants are made with a waterproof fabric. In
most of today’s popular drywear, the material is “breathable”
as well, to allow air and water vapor to pass through it, keeping you
more comfortable inside. Waterproof and breathable fabrics are made
by either laminating a waterproof, breathable membrane, or painting
on a waterproof, breathable coating to the inside of the outer fabric.
There are also dry suits, tops and pants that are made with non-breathable
waterproof materials. These tend to be less expensive than the breathable
options, but they don’t regulate heat and moisture the way breathable
drywear does.
That explains how the material keeps water out, but what about the
neck, wrist and ankle openings? All drywear has latex gaskets attached
at these openings. Latex is a stretchy, supple material that will
effectively seal water out of the garment when the gasket is sized
properly so that it’s tight against bare skin. That’s
the good news.
However, latex gaskets are relatively fragile, largely due to aging
and direct sun exposure. If torn, these gaskets must be replaced.
Also, latex gaskets must fit very snug to keep water out. As a result,
especially with the neck gasket, some boaters find this snugness very
uncomfortable.
Now, finally, we’re back to what does “semi-dry”
mean. Instead of the latex gaskets, semi-dry garments will feature
some sort of non-latex alternative, such as a snug neoprene cone-shaped
“punch through” cuff, or a wider neoprene cone with a
“hook and loop” adjustable flap used to tighten the opening.
While not as dry as latex gaskets, these neoprene closures keep most
of the water out; hence garments with them are referred to as “semi-dry”.
So, when are semi-dry garments appropriate? They’re great when
you know you won’t be fully immersed, swimming or upside down
a lot. Semi-dry wear is ideal for river runners of all types, as well
as touring kayakers, recreational canoeists or anyone enjoying themselves
in milder waters. They are most appropriate in the non-winter months:
late spring, summer and early fall, when the weather’s pretty
nice and the water isn’t icy-cold.
