Patagonia Men's R1 Air Zip Neck - Black SIZE:XL drawcord adjustable external pockets and

drawcord adjustable external pockets and an X-tension drawcord system

GORE-TEX® Extended Comfort waterproof membrane

These properties mean the Proton works outstandingly well as a mid-layer beneath a shell

Five panel construction

Patagonia Men's R1 Air Zip Neck - Black SIZE:XL drawcord adjustable external pockets andA finely tuned bit of technical fleece from Ventura's finest. Patagonia are the fleece pioneers so it's maybe no surprise they're still pushing this majestic synthetic fabric forward with designs like this. The R1 Air Zip Neck is a lightweight, performance oriented piece, designed to take on some serious alpinism, with a low profile design allowing it to fit under jackets and harnesses with ease. Constructed from a fully recycled polyester jacquard