The Mares Explorer Illusion 50 5mm Open Cell Jacket is an open-cell neoprene open cell built specifically for freedivers and spearfishers. The 5mm open-cell inner surface moulds to the body like a second skin, trapping a micro-layer of warm water that insulates effectively even during long, static breath-hold dives. Supple and unrestricted, it’s the kind of gear that disappears on your body at Sipadan’s spearfishing grounds.
Technical Specifications
| Specification | Details |
| Brand | Mares |
| Model | Explorer Illusion 50 5mm Open Cell Jacket |
| Thickness | 5mm |
| Gender | Unisex |
| Material | Open-cell neoprene (inner) |
| Zipper | Side zip / no zip |
| Stitching | Glued seams |
| Seams | Open-cell sealed |
| Best For | Freediving, Spearfishing, Apnea diving |
Key Features
- Open-cell inner surface: Moulds to the body like a second skin for maximum insulation during static apnea dives.
- Supple neoprene: Minimal resistance to movement – essential for breath-hold efficiency.
- Glued seams: Keeps the suit tight and warm without the stiffness of stitched construction.
- Freediving-specific cut: Panels are shaped to allow the chest expansion needed during deep breath-holds.
Suited for Malaysian Dive Sites
The Mares Explorer Illusion 50 5mm Open Cell Jacket performs reliably across Malaysia’s premier diving destinations. Whether you’re exploring Sipadan’s spearfishing grounds, or venturing to new reefs and wrecks, this wetsuit delivers the warmth, flexibility, and comfort you need on every descent.
Care & Maintenance
- Rinse in fresh water immediately – open-cell neoprene absorbs salt water and degrades if left.
- Never tumble dry; hang flat or lay on a towel to dry slowly.
- Store away from direct sunlight – UV destroys open-cell neoprene faster than closed-cell.
- Do not use fabric softener or conditioner – it clogs the open-cell pores and reduces insulation.
Final Verdict
Freedivers and spearfishers know that every gram of drag and every degree of warmth matters. The Mares Explorer Illusion 50 5mm Open Cell Jacket delivers on both – a suit that gets out of your way and keeps you comfortable on the breath-hold.




Luke Wong –
I’ve been using the Mares Explorer Illusion 50 5mm Open Cell Jacket for a few dives now, and it’s been a game-changer. The neoprene is super soft and flexible, making it easy to move around underwater. However, the zipper could be a bit more secure.
Amara Teo –
I recently tried the Mares Explorer Illusion 50 5mm Open Cell Jacket, and I was blown away by its comfort and warmth. The open-cell design allows for great mobility, making it perfect for scuba diving or snorkeling. I particularly love the Brown color, it’s so subtle and stylish.
Cassandra Lee –
Can this jacket be used for cold water diving? Are the properties of the open-cell design suitable for conditions below 10°C?
Imran Hanafiah –
Thank you for your review, Cassandra! The Mares Explorer Illusion 50 5mm Open Cell Jacket is a versatile and comfortable dry suit, but it’s designed for temperate waters. While it’s made with high-quality materials, it’s not specifically intended for cold water diving. The open-cell design provides excellent insulation in warm waters, but may not be sufficient for colder conditions below 10°C. However, we’ve had customers use this jacket for cold water diving with great results, but it ultimately depends on individual preferences and diving techniques. If you plan to dive in cold water regularly, we recommend exploring options designed specifically for cold water diving.
Jannah Tay –
What are the weight and size of the Mares Explorer Illusion 50 5mm Open Cell Jacket when it’s packed?
Imran Hanafiah –
Thank you for reaching out to us, Jannah Tay. Unfortunately, we don’t have the exact weight and size of the Mares Explorer Illusion 50 5mm Open Cell Jacket when it’s packed in our database. However, we’ll reach out to our supplier to provide you with the most up-to-date information. You can expect a follow-up from us within the next 3-5 business days.
Kaitlyn Ong –
What is the difference between the 3mm and 5mm version of the Mares Explorer Illusion Open Cell Jacket? I’m thinking of buying one, but I want to make sure I get the right thickness for my diving needs?
Imran Hanafiah –
Hello Kaitlyn, thank you for considering the Mares Explorer Illusion Open Cell Jacket for your diving needs. The main difference between the 3mm and 5mm versions of this jacket is the thermal insulation and buoyancy. The 3mm version provides slightly less warmth and is designed for warmer diving conditions, while the 5mm version offers more insulation and is suitable for colder water dives. If you’re planning to dive in cooler waters, the 5mm version would be a better choice. On the other hand, if you’re diving in warmer waters, the 3mm version would be a suitable option. The 5mm version (the one you’re looking at) has a 5mm thickness, which provides additional warmth and protection. Please let us know if you have any other questions or if there’s anything else we can help you with.
Ethan Tan –
I just got my hands on the Mares Explorer Illusion 50 5mm Open Cell Jacket, and I’m so impressed with its quality. The stitching is solid, and the material feels luxurious. However, I worried about the durability of the jacket’s seams over time.