Versatile insulation for all your outdoor adventures: Women's Geckois one of Jack Wolfskins' all-time favourite pullovers. And because the fleece is produced from recycled PET bottles, it's good for the environment too. You can wear this robust fleece pullover as a mid layer in a technical layering system or slip it on over your base layer for a little extra warmth during rest breaks on the trail. Material: 100% Polyester.