The Finnfill Light sub-blanket is made of elastic and waterproof material that provides excellent thermal insulation. It is made of four layers;
- insulating: made of Finnfill fibres
- a waterproof and breathable X- Tex membrane
- surface: elastic and smooth Tricot fabric
- inner: fleece
Finnfill insulation is the most distinctive and unique feature of X-Tex sub-blends. The material does not lose its insulating properties even after repeated washing and retains them even when the suit is completely wet. The suit has ventilation holes on the left sleeve and underarm, a double zip fastening, a zipped chest pocket and large pockets on the thighs.