Regatta grisedale jacket mens the regatta grisedale jacket is engineered for we conditions thanks to waterproof and breathable isotex 15 000 ripstop fabric with a dwr finish and integrated thermo guard synthetic insulation offering lightweight protection from the cold mens waterproof jacket isotex 15 000 fabric strategic stretch panels dwr finish taped seams throughout thermo guard insulation internal stormflap grown on technical hood with adjusters articulated sle