Best Drysuit Underwear of 2021: Complete Reviews With Comparisons

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Drysuits are great for keeping you completely dry in the water, but they need to be layered with the right underwear to be truly effective.

Drysuits are designed to add a small amount of insulation and to keep water from getting inside.

True insulation and warmth must be created through supplemental layers!

If you want to have the best experience possible, it’s important to find the best drysuit underwear available on the market.

Today, we will cover three of the top options for you to consider.

Use the included buyer’s guide and FAQ to help you determine what will work best for your next adventure!

Comparison Chart

SEAC Unifleece Insulating Undergarment Dry Suit

Scubapro K2 Extreme Steamer Drysuit Undergarment 

Body Glove mens Drysuit Undergarment

Drysuit Underwear Reviews

1. SEAC Unifleece Insulating Undergarment Dry Suit

First up is the SEAC Unifleece Insulating Undergarment Dry Suit, an affordable undergarment option for adventurers of all experience levels.

SEAC is a company well-known for their diving experience and high-quality water gear, and this suit is one of many that they have made well since 1971.

Product Highlights

The SEAC Unifleece Undergarment Dry Suit is a one-piece fleece undergarment you can wear under any type of drysuit.

The undergarment is made from two layers of breathable, lightweight fabric that will keep your dry and warm.

SEAC has equipped this suit with a front zipper for easy wear as well as great ankle stirrups, which help to keep everything in place while in your drysuit.

The Good

You can use this suit in warmer water conditions on its own or as the undergarment layer to a true drysuit when you’re dealing with lower water temperatures.

Since it is a high-quality one-piece suit, it has multiple uses depending on your needs.

The Bad

The outer layer of this fabric is said to repel water, so some people have confused it for a drysuit, but it is not a drysuit.

Instead, this is just an undergarment layer that can be used as a wetsuit on its own or as a layer to help keep you warm under a proper drysuit.


  • Great layering under a proper drysuit
  • Easy to fit
  • Useful pockets and ankle stirrups
  • High-quality construction


  • Does not fully repel water
  • Not fully sealed around neck and wrists

2. Scubapro K2 Extreme Steamer One-Piece Drysuit Undergarment

Next, let’s take a closer look at the Scubapro K2 Extreme Steamer One-Piece Drysuit Undergarment, a mid-range drysuit undergarment that is very popular with divers.

Product Highlights

This Scubapro K2 Extreme Steamer One-Piece Undergarment is made from dual layers of compressed fleece material that will help to keep you warm and dry under your drysuit.

The shoulders, knees, and chest have extra compression padding that will help keep you from feeling too squeezed in.

This suit has heel straps, a front zipper, wrist loops, and more to help it go on easily and stay in place while wearing it.

Finally, these undergarments have a nice, streamlined design.

The Good

This particular drysuit undergarment is one of the best at its price point because of the adaptations it has in place to make it very comfortable.

While some undergarments can be bulky or constricting, this one fits smoothly.

It can even help to alleviate some of the strain and pressure that builds up from standard, tight-fitting suits.

The Bad

This suit adds a minimal amount of buoyancy, which might be annoying for some divers, but the amount is almost negligible for most.


  • Streamlined, attractive design
  • Front zipper for easy wearing
  • Comfort compression pads in knees, shoulders
  • Can be adapted for P-valve


  • Adds a small amount of buoyancy
  • Unisex sizing

3. Body Glove Men’s Drysuit Undergarment

The final undergarment layer we are looking at today is the Body Glove Men’s Drysuit Undergarment, a mid-range drysuit undergarment designed specifically for men.

Product Highlights

The Body Glove Men’s Drysuit Undergarment is a double-sided thermal fleece garment with synthetic properties to help wick away any sweat.

The seams on this drysuit are reinforced with flatlock stitching so that they will not easily tear or leak, and the overall suit is anatomically designed to suit a standard male body.

Entry into the suit is done with a double-ended front zipper, and the legs end with elastic stir-ups to keep everything in place once you’re in your drysuit.

The Good

This particular undergarment is very easy to use both when putting it on and in taking care of it.

The double-ended front zipper makes it easy to wear, and the suit is machine washable and dryer-friendly, so it’s easy to take care of.

The Bad

This particular undergarment is designed specifically to fit men, so it might not comfortably fit some women.

This is a common problem with unisex designs, but in this case, the design can still work for many women.


  • Flatlock seams won’t irritate the skin
  • Double-sided fleece for insulation
  • Can be put in the dryer at home
  • Easy to size


  • Designed for men
  • Limited customization options

Drysuit Layers Buyer’s Guide

When choosing what layers you should wear underneath of your drysuit, you might be a bit overwhelmed by all of the different drysuit layers that are available on the market today.

To select the right layers for your needs, walk through this buyer’s guide with us.

1. One Piece vs. Two Piece

Drysuit layering pieces are available as either one-piece undersuits or as two-piece layers.

One-piece undersuits are very common since you can put them on without having to worry about the layers meeting up properly.

They also tend to have better-insulating properties since there are fewer openings.

However, one-piece suits can be hard to put on, and they often need to have thermal layers underneath them to help absorb sweat and smells.

On the other hand, you can wear two-piece layers underneath your drysuit in the form of tops and long underwear.

These pieces can be made from fleece or synthetic materials, among others, and they are very easy to size since you can customize them to your particular body type easier than a bodysuit.

Often, people use both separate and one-piece layering when they are getting ready with their drysuit.

You can mix and match all of these things.

2. Custom or Off Rack

You can purchase drysuit layering options in a custom sizing or off the rack in standard sizing options.

It is up to you to decide if you want or need to get a custom-sized item.

Custom-sized layering is great because it will fit you perfectly, and a good fit can help improve insulation.

Still, not everyone needs to splurge on custom sizing since there are many different standard sizing options on the market that might work for you.

Consider all of your off rack options before you look for custom sizing to save some money.

The primary time that custom sizing should become a focus is if you plan to get a one-piece undersuit and can’t find a good size option; these work exceptionally in custom sizing.

3. Warmth

Different types of underwear are made for different conditions; you will need to figure out how much warmth you need to generate.

Fleece underwear, for example, comes in different ratings depending on how much heat they will trap.

If you will be in very cold water conditions, a higher-rated fleece is going to be necessary.

4. Layering

In most cases, you won’t be wearing just one piece of layering underneath of your drysuit.

To truly protect yourself from the cold, it is preferred to add a few different layers with different purposes.

For example, you might wear neoprene socks, gloves, leggings, t-shirt, and cap as your base layer to wick moisture from your body.

Then, you would wear fleece layers on top of that to keep your body well-insulated.

5. Design and Fit

The style and fit of your underwear are significant; you want to be sure that it fits you in such a way that you are not losing any mobility.

When you’re deciding between underwear options, make sure that you try them on underneath of your drysuit to see how well you will be able to move and how the overall layering will look.

6. Material

When choosing an undersuit or underwear layers for your drysuit, you need to be very careful to select the right materials.

Some people will go for cotton or wool because they are known for good insulation.

That said, both of these materials trap moisture, which could lead you to feel damp or even ending up with hypothermia symptoms if you get too wet underneath of the drysuit.

Instead, you must look for fleece or synthetic materials when choosing your insulating layers.

The layer closest to your body, in particular, should be a material that will absorb and wick moisture away from your skin to prevent any dangerous moisture buildup.


1. What Do I Wear Under a Drysuit?

While drysuits are great at keeping you dry and add some insulation, they are not an effective way of staying warm in very cold water unless you layer undergarments underneath.

Layering can be done in various ways depending on what water temperature you need to be dealing with.

Follow these tips for the best experience:

  1. Your first layer should be a thin, short sleeve synthetic top.
  2. Add layers of fleece to keep you warm.
  3. Fleece is rated at different levels; higher-rated fleece keeps you warmer.
  4. Don’t wear more layers than needed; overheating could be an issue.
  5. Don’t forget your head; layer a neoprene hood or fleece cap under your drysuit hood.
  6. Wear layering socks under the suit to protect your feet.
  7. Cotton and wool can be used, but they both will stay wet from perspiration longer than fleece or synthetics.

If you keep these things in mind when choosing your drysuit layers, you’ll be pleasantly surprised at how warm you are in the water.

Not only will you stay dry, but the right undergarment layers will also ensure that your sweat doesn’t make you feel uncomfortable.

2. What is the Difference Between Regular and Drysuit Undergarments?

Regular undergarments that you wear in your daily life are for protecting certain areas of your body, adding warmth, or smoothing out specific areas of your body.

Drysuit undergarments, on the other hand, are used to add breathable layers that will keep you warm while in cold water conditions.

The layers are insulating. They keep the heat in and can help to regulate the overall temperature of your body.

If you have ever lived somewhere very cold and used layering undergarments like fleece, long underwear, these are more similar to drysuit undergarments.

Thermal underwear is commonly worn in both situations, so there is a good amount of overlap in the layers that can be used to keep you warm in both wet and normal situations.

Day-to-day undergarments are not typically made for insulation or breathability purposes, but drysuit undergarments must have these properties.

3. How Do I Clean Drysuit Underwear?

If you buy an undersuit coated with any type of Thinsulate properties or similar chemicals, follow the manufacturer’s instructions for best laundering results.

In most cases, these undersuits can be laundered frequently and normally without losing any of their insulating properties.

For other layers like fleece, thermal underwear and synthetic tops, you can wash them regularly in cold or warm water, depending on the material they are made from.

These layers are used to help absorb sweat, and they will need to be laundered frequently.

The best way to know how to wash is to check the manufacturer’s instructions or to have them professionally cleaned.

Final Verdict

Now that you know more about why choosing one of the best drysuit underwear options is so important, it’s time for us to reveal which we find to be the best of the best.

Today, we’re rating SEAC Unifleece Insulating Undergarment Dry Suit at the top of our list.

This insulating drysuit is a one-piece wonder that will do a great job of trapping heat, and you can often use, without any additional layers.

Another great option is the Scubapro K2 Extreme Steamer One-Piece Drysuit Undergarment, a great synthetic option that keeps your body dry even from your own sweat.

Overall, there are many great drysuit underwear options. The key is that you understand what you need and why you should choose your underwear carefully.

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