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You don't need a PhD to know the Smartwool PhD® Hinged Balaclava and its soft merino wool blend is exactly what you need when you enter the white room.
Content – 45% Nylon / 39% Merino Wool / 16% Elastane
Lining – 56% Merino Wool / 44% Polyester
One Size Fits Most
Single Layer Interlock Knit Construction
Comfortable Face Protection with Good Peripheral Vision
Top of Balaclava is Hinged and Can be Pulled Back for Extra Venting