Capilene® Thermal Weight Zip-Neck Color:Endless Blue (ENLB) The interior has an RFID-blocking

The interior has an RFID-blocking card pocket

Slip-resistant classic diamond pattern design

Straps are 68% recycled polyester

3-oz 100% recycled polyester brushed tricot

while still offering the comfort you've come to know from BIRKENSTOCK

Capilene® Thermal Weight Zip-Neck Color:Endless Blue (ENLB) The interior has an RFID-blockingA breathable, lofted baselayer to keep you warm in cold conditions. Polartec Power Grid fabric with HeiQ Fresh durable odor control. Fair Trade Certified sewn. Warm, Comfortable Fabric Polartec Power Grid fabric with HeiQ Fresh durable odor control has a smooth face for easy layering; fabrics open grid pattern next to skin provides superior warmth, breathability and moisture wicking performance Self Fabric Zip Neck Self fabric backing on collar with