Extra Warmth for Cold Water Diving
The NONZERO GRAVITY Magma Thermal Layer is a neoprene top we use in the shop as an added warmth layer under a wetsuit—especially during colder months.
Originally designed as a sauna shirt, this piece works exceptionally well for scuba diving when layered under a hooded vest and wetsuit, helping retain heat around your core and extend your comfort in cold water.
If you tend to get cold on dives or want to stay warmer between dives, this is a simple and effective addition to your setup.
Why We Use It for Diving
Adds Core Warmth Without Bulk
Neoprene traps heat at your core, helping you stay warmer without needing to jump straight to a drysuit.
Perfect Layering Piece
Fits comfortably under a hooded vest and 7mm wetsuit without restricting movement.
Extends Dive Comfort
Helps reduce heat loss on longer dives and during surface intervals.
Flexible & Low Profile
Moves with your body and doesn’t bunch under your suit.
Breathable Panels
Mesh underarms help prevent overheating while gearing up.
How to Use It
- Wear as a base layer under your wetsuit
- Pair with:
- Hooded vest
- 7mm wetsuit
- Gloves & boots
→ Ideal for SoCal diving in colder conditions
Ideal For
- Divers who get cold easily
- Winter and spring diving in Southern California
- Multi-dive days
- Extending warmth without upgrading to a drysuit
Key Features
- 100% neoprene construction for heat retention
- Mesh sleeves & underarms for breathability
- Flat-lock stitching to prevent chafing
- Flexible fit for full mobility
- Reflective detailing (useful for surface visibility)
Care Instructions
- Hand wash in cold water
- Lay flat to dry (out of direct sunlight)
- Do not machine dry, iron, or dry clean
Size Chart (Men’s)
| Size | Height | Weight (lbs) | Chest (in) | Waist (in) |
|---|---|---|---|---|
| S | 5'4"–5'7" | 125–155 | 31–34 | 31–34 |
| M | 5'6"–5'9" | 135–180 | 33–36 | 33–36 |
| L | 5'7"–5'11" | 145–200 | 35–39 | 35–38 |
| XL | 5'8"–6'1" | 155–220 | 38–42 | 36–40 |
| 2XL | 5'9"–6'2" | 170–235 | 40–46 | 37–42 |
| 3XL | 5'10"–6'3" | 180–240 | 43–48 | 38–43 |
| 4XL | 5'11"–6'4" | 185–255 | 45–50 | 39–44 |
| 5XL | 5'11"–6'5" | 190–260 | 47–51 | 40–45 |
Fit Guidance
- Designed to fit snug for heat retention
- If between sizes → size up for comfort and layering
Blue Holic Tip 🌊
If you're diving in SoCal and still getting cold in a 7mm, adding this under your hooded vest is one of the easiest ways to notice a real difference in warmth without changing your whole setup.