Whether you're planning a tropical diving holiday or exploring UK waters, choosing the right diving wetsuit is essential for warmth, comfort, and safety. In this ultimate guide, we’ll dive into the different styles of wetsuits, how they work, why fit is so important, and which wetsuit is best for specific water temperatures. We’ll also explore neoprene-free alternatives for divers with allergies and highlight the top wetsuit brands available at the Oyster Diving Shop.

How Do Wetsuits Work?

A wetsuit works by trapping a thin layer of water between your body and the suit. Your body warms this water, creating a thermal barrier that helps prevent heat loss in cold water. Made primarily from neoprene, wetsuits offer flexibility, buoyancy, and insulation. The thicker the neoprene, the warmer the suit.

Why Fit Matters

A wetsuit should fit snugly without restricting movement. A poor-fitting wetsuit allows cold water to flush in and out, dramatically reducing its insulating properties. At Oyster Diving Shop, we always recommend trying on a wetsuit to ensure a perfect fit, especially around the neck, wrists, and ankles where water can easily enter.

What Wetsuit to Wear by Water Temperature

Different Styles of Diving Wetsuits

There are three main types of wetsuits, with many variations in between. You can have different grades and quality of neoprene too which will effect heat retention.

1. Shorty 3mm Wetsuits

• Best for: Warm tropical waters (26°C and above)

• Description: Mostly short-sleeved and short-legged wetsuits that provide basic thermal protection and sun protection.

• Example: Fourth Element Xenos Shorty Wetsuit

If you would like a little more protection from the cold, or possible stingers, then 3mm full length suits are also available.

2. 5mm Full-Length Wetsuits

• Best for: Moderate water temperatures (18°C to 25°C)

• Description: Full body coverage with moderate thermal protection, great for UK summer diving or Mediterranean conditions.

• Example: Fourth Element Proteus II Wetsuit

3. Semi-Dry Wetsuits

• Best for: Cold water diving (10°C to 17°C)

• Description: Sealed seams, thicker neoprene (often 6.5mm), and internal seals to reduce water flushing – almost a drysuit without the price tag.

• Example: Beuchat Semi-dry X-Trem Men

Neoprene-Free Alternatives

For divers with neoprene allergies, there’s a fantastic alternative: the Fourth Element Thermocline range. These suits are made from non-neoprene fabric that mimics the thermal protection of a 2-3mm wetsuit. Lightweight, neutrally buoyant, and easy to travel with, they are ideal for warm water diving and layering under drysuits.

Recommended Wetsuit Brands at Oyster Diving Shop

At Oyster Diving Shop, we proudly supply premium-quality wetsuits from top scuba diving manufacturers:

• Fourth Element – Sustainable, innovative designs including the neoprene-free Thermocline range.

• Beuchat – European design with ergonomic fits and durability.

• Bare – Often regarded as the Rolls Royce of scuba diving wetsuits.

• Waterproof – Known for their robust semi-dry suits perfect for UK conditions.

• Aqualung – A favourite for recreational divers, offering a wide range of styles and fits.
  

Size Charts

To help ensure you have the perfect fitting wetsuit, we have compiled sizing charts:

Generic Wetsuits

Fourth Element

Bare

Mares

Final Thoughts

Choosing the right wetsuit for diving is crucial for an enjoyable and safe dive. Always consider the water temperature, your tolerance to cold, and whether you might need extra layering. For those with neoprene sensitivities, the Fourth Element Thermocline is a game-changer.

You can explore our full range of high-quality wetsuits from Fourth Element, Beuchat, Cressi, Waterproof, and Aqualung at the Oyster Diving Shop. Our team is happy to help you find the perfect fit, whether you're diving in the UK or abroad.

CHECK OUT OUR RANGE OF TOP-CLASS WETSUITS