So I decided to make up a chart that shows a comparison of the fabrics used for their old and new line of Patagonia Capilene and Regulator series because others and myself have wondered how they compare. Most of this information is from the Patagonia website and talking with their customer service people. Please feel free to add any information you might have.
Old
New
Silkweight – 3.5/3.9oz Polyester
Capilene 1 – 3.7oz Polyester
Lightweight – 4.6oz Polyester
Capilene 2 – 4.0oz Polyester
Midweight – 5.1oz Polyester
Capilene 3 – 4.8oz Polyester
R.5 – 5.3oz Polartec Power Dry
Capilene 4 – 5.3oz Polartec Power Dry
Expedition Weight – 6.0oz Polyester
El Cap – 5.7oz Polyester
R1 – 6.5oz Polartec Power Dry
R2 – 7.4oz Polartec Thermal Pro
R3 – 12.0oz Polartec Wind Pro
R4 – 13.5oz Polartec Windbloc and 7.4oz Polartec Thermal Pro

