Rooster Classic ThermaFlex 1.5mm LongJohn
Versatile, flexible and built for year-round comfort. The Rooster ThermaFlex™ 1.5mm LongJohn uses 4-way SuperStretch neoprene with a soft plush lining for warmth, protection and unrestricted movement. Worn alone, over PolyPro™, or with a matching ThermaFlex™ top, it adapts to every season and every session.
What makes this LongJohn good
- 1.5mm 4-way SuperStretch neoprene – warm, flexible and protective without bulk.
- Soft inner plush lining – adds insulation and comfort against the skin.
- Tailored, unrestrictive fit – shaped for movement whether you’re hiking, trapezing or paddling.
- Asymmetric Velcro shoulder entry – easy on/off with a smooth fit across the chest.
- Concealed relief flap – built-in practicality for long days afloat.
- Duratex II knee and seat panels – wear-resistant reinforcement for extra durability.
- ProHike Pad compatible – slide pads in for hiking support or leave out for unrestricted flexibility.
On-water performance
The ThermaFlex 1.5 mm LongJohn is a go-to layer for SUP touring, fitness paddling and coaching in cooler conditions. The stretchy neoprene moves naturally with your stroke, while the plush lining keeps warmth locked in without overheating. Add a PolyPro™ base for winter or a ThermaFlex™ top for all-round protection when the breeze picks up.
Materials & technical details
- 1.5 mm SuperStretch neoprene (4-way stretch)
- Soft inner plush lining
- Duratex II reinforced knee and seat panels
- Asymmetric Velcro shoulder entry
- Integral relief flap
- ProHike Pad compatible design
| Thickness | 1.5 mm |
|---|---|
| Neoprene type | 4-way SuperStretch |
| Lining | Soft thermal plush |
| Reinforcements | Duratex II knee and seat panels |
| Entry system | Asymmetric Velcro shoulder |
| Relief flap | Integral/concealed |
| ProHike compatibility | Yes – accepts Rooster ProHike Pads |
| Best use | SUP touring • Sailing • Coaching • Cold-water training |
| Care | Hand wash in warm soapy water and air dry |
Fit & layering
Designed for a close, flexible fit. Wear alone for mild conditions, over PolyPro™ for extra insulation, or pair with a ThermaFlex™ Top for a complete 1.5mm setup. Compatible with Rooster ProHike Pads when hiking support is required.
Size guide
Measure around your chest at the widest point and refer to the chart below to find your ideal fit.
| Size | Chest (cm) | Waist (cm) | Inside Leg (cm) |
|---|---|---|---|
| XS | 86–92 | 71–76 | 71 |
| S | 92–97 | 76–81 | 73 |
| M | 97–102 | 81–86 | 76 |
| L | 102–107 | 86–91 | 79 |
| XL | 107–112 | 91–97 | 81 |
| 2XL | 112–117 | 97–102 | 84 |
FAQ
Can it be used for paddleboarding?
Yes. The stretch neoprene and reinforced seat make it ideal for SUP touring and cooler-weather training.
Is it lined?
Yes. The inner plush lining feels soft and adds thermal comfort against the skin.
How thick is it?
1.5mm neoprene throughout – providing warmth without limiting flexibility.
How should I layer it?
Add PolyPro™ Leggings and PolyPro™ Top beneath in winter, or use the ThermaFlex™ Top over it for a balanced mid-season setup.
Our take
Flexible, durable and adaptable. The Rooster ThermaFlex 1.5 mm LongJohn bridges the gap between warmth and movement - perfect for year-round SUP touring, coaching or sailing when you need comfort without bulk.
