The Secret to Patagonia's Summer Tuned Fleece Isn't Bold Colors Patagonia Lightweight Synchilla Snap T Fleece Pullover Men's Clothing Patagonia Lightweight Synchilla Snap T Pullover (Swallowtail Geo Patagonia Lightweight Synch Snap T Fleece Pullover Smolder Blue Patagonia Mens Lightweight Synchilla Snap T Fleece Pullover Blue. An unadulterated Patagonia classic, the Synchilla Snap T Pullover is a definitive archival piece, still deserving of a place in the range and in your wardrobe. Keeping the cold at bay since 85 its now celebrating over 30 years of doing just that.