The key difference between a t-shirt and a drysuit lies in how much water can enter the suit. It is up to you and the activities that you are going to be participating in that will decide if you want a wetsuit or a drysuit. Consider questions such as how much time you'll be in water, how cold the water gets, and your body type.
Goretex dry suits
Fabric is a major difference between GoreTex dry suits versus wetsuits. Non-GoreTex wetsuits don't breathe nearly as well and aren't quite as comfortable or durable. New dry suit fabrics have been developed, including breathable and waterproof fabric. Kokatat for instance, created a drysuit made from durable yet breathable Gore-Tex fabric. Kokatat's suits became the first to go on the market.
Trilaminate dry suits
The only difference between wet and dry suits is their outer shells. Trilaminate suits have a waterproof feature, however they lack insulation. They also require a better fitting and are less flexible that trilaminate ones. This article will discuss the differences between trilaminate and wet suits, and give tips for choosing which suits you best.
Hydrus 3L fabric dry suits
The Kokatat Hydrus 3L update to the T3 Swift Entry features a three-layer, water-resistant, breathable fabric. The Kokatat Hydrus 3L's tough nylon outer and micro-porous polyurethane inner layers move water vapor away. Meanwhile, the soft knit polyester layer is gentle on your skin. To keep water out, this drysuit is also equipped with tough latex neck and wrist gaskets.
Hydrus 3L fabric suits by Kokatat and Stohlquist
If you want to be warm and comfortable while you swim, you'll love the Kokatat Hydrus 3L Meridian dry suit. The suit has a drop-seat, a hood and Cordura(TM), panels to keep you warm from the cold. This suit is also adjustable and features waterproof and breathable socks. The adjustable bungee waist belt can be used to achieve a better fit.
Suits by IR
A wetsuit is more durable than a drysuit when it comes to keeping you dry. Dry suits can keep you warm while also keeping water from transferring to your body. A lot of dry suits also have purge vals. Dry suits are often used by Aircrews.