ISG stands for "Insulated Shell Garment". It is a multifunctional jacket which emerged from the military special forces area. The merger of softshell outer layer with the G-LOFT® insulation makes the ISG jacket a real "hybrid". The excellent heat storage capacity of the G-LOFT® fiber and the water-repellent, windproof and breathable properties of the 3-layer softshell outer layer gives this jacket its distinctive character.
FEATURES
Detachable & stowable hood
Hood with elastic drawstrings adjustable in 2 directions
Width adjustable collar with thermo fleece
Water-repellent YKK® zippers
2-way front zipper with wind flap and chin guard
Ventilation system - access openings with zipper at the side seam
2 large outer pockets with micro fleece
Pre-shaped sleeves
2 upper arm pockets with Velcro for attaching badges
Internal, one-handed adjustable elastic drawstring at hem
Good light jacket that can stow away small in the included pouch. I find it useful for cooler days (~10°C) but not much colder unless very active. Haven't tried it in a downpour yet but the material and zips look very water resistant.
I usually buy medium and this is a good body fitting jacket. You can't wear a lot under it.
If really cold it can be used as an underlayer for the MIG jackets.