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Supertherm® long john 4mm

Supertherm® long john 4mm

Regular price £235.00
Regular price £235.00 Sale price £235.00
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New generation Supertherm® 4mm longjohn developed using enhanced fabrics and an updated fit. The longjohn has a quick dry super soft front panel designed to work in conjunction with the Supertherm® Top, which has a quick dry panel at the back in order to provide superior warmth and comfort around the entire core when worn together.The fabrics and features used on this longjohn mean it will be your best friend in the coldest conditions (below zero) but should also be able to take you up to around 15 degrees, when layered with a cooler top option.

Now with improved relief flap with triple layer construction to reduce water inlet.


  • Water based glue construction (no harmful chemicals released in manufacturing)
  • Prebent legs and body for optimum fit in watersport applications
  • Clean entry system with no velcro
  • Quick dry thermal lining throughout with a super wicking heat boost panel inside chest
  • Relief flap at crotch
  • ProHike Pad compatible
  • Silicon print on inside of ankles
  • Reinforced seams at lower legs for capability to cut legs to a shorter length
  • Drainage holes at back of lower legs for quick flushing
  • GBS (glued & blind stitched)
  • DWR (durable water repellent) coating on front of legs


  • Recycled polyester
  • Ventiprene®
  • Duratex III seat and knee panels
  • Limestone 4mm neoprene

Size chart

To use the size chart, find a size that best fits your inside leg, chest and waist measurements. If you can't match all three of these criteria, please take into account your body shape and choose the closest match.


Size Inside Leg Chest Waist
Junior Small 59.5-63.5cm 60-66cm 55-60cm
Junior Large 64.5-67cm 68-81.5cm 63.5-67cm
X-Small 69.5cm 85-92cm 71-76cm
Small 72.5cm 92-97cm 74-76cm
Medium 75cm 97-102cm 79-84cm
Large 77.5cm 102-109cm 87-94cm
X-Large 80cm 109-119cm 97-102cm
2X-Large 81.5cm 119-125cm 104-109cm


Size UK JL 8 10 12 14 16
Size EU - 36 38 40 42 44
Chest 68-75cm 82cm 87cm 92cm 97cm 102.5cm
Waist 59-61cm 65cm 70cm 75cm 80.5cm 86cm
Hip 80-82cm 90cm 95cm 100cm 105cm 110cm

Care instructions

Laundry instructions

Rooster recommend hand washing in warm soapy water and allowing to air dry.

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