Northern Diver Scuba Diving Thermalux Undersuit size MLR. (see size guide photo 9). This suit offers a lightweight 1kg approx. Streamlined solution to keeping warm.Superb insulation and flexibility, completed with a breathable microfibre outer and is quick drying. The undersuit has warmth retaining panels in the lower back, shoulders, cuffs, lower legs. Hand thumb and foot stirrups. Super absorbent micro fleece inner lining.