How it surfs
Outside Bozeman's reviewer used the R4 for river surfing and kayaking in spring runoff and called it the best wetsuit he had ever worn, noting the rubber is highly flexible for the thickness and the 38 to 48 °F rating held up.
Surf Bunker tested the R4 hooded suit with R5 booties on the west coast of Sweden and chose it over the R5 deliberately, reasoning that short-period wind swell means constant paddling, so the extra freedom of movement mattered more than the extra millimetre. Both reports point the same way on warmth. Neither publishes a numeric score, so the Surfex rating here is an estimate from specification and consistent published feedback rather than an average of scores. If you surf warmer water, the R3 Yulex or a 4/3 like the Xcel Infiniti is the more sensible buy.
Volume & sizing chart
Use the chart below as a starting point. Add half a litre if you are less experienced, subtract half a litre for a looser feel.
| Size | Volume | Rider weight | Best for |
|---|---|---|---|
| S, MS, M | 5.5/4 mm hooded | 61–77 kg | All levels |
| MT, LS, L | 5.5/4 mm hooded | 72–86 kg | All levels |
| LT, XLS, XL | 5.5/4 mm hooded | 82–95 kg | All levels |
| XXL | 5.5/4 mm hooded | 95 kg+ | All levels |
How it compares
| Board | Best at | Wave range | Aggregate score |
|---|---|---|---|
| Patagonia R3 Yulex | Non-hooded 4.5/3.5 Yulex | 9–13 °C | 9.0 |
| Xcel Drylock 5/4 Hooded | Limestone-neoprene hooded rival | Winter | 9.2 |
| Vissla North Seas 5.5/4.5 Hooded | Value hooded winter suit | Sub-10 °C | 9.0 |
Verdict
A hooded winter suit for surfers who want warmth without petroleum neoprene. Two published reviews agree it delivers heat in 3 to 9 °C water, and at $456.75 it undercuts several limestone rivals in the same thickness bracket.