-Merino wool clothes for base layers are best (+ for bra and undies)
-Better to layer rather than buying a bulky hot coat

Iceland11

Coghlan's Mosquito Head Net: Ultra-Fine Mesh Netting Protection for Face and Neck Against Bugs Gnats Flies Insects, for Outdoor Camping, Hiking & Fishing - Coghlan's 2508 Mosquito Head Net