- NWT, only tried on - No flaws When it comes to perfecting winter function and style, no boot does it better than Joan of Arctic™. Featuring waterproof suede, a seam-sealed waterproof design, and a rubber sole for grip — it's not hard to see why it's considered a winter essential. UPPER: Available in a waterproof suede upper with faux fur cuff. Seam-sealed waterproof construction. Laces are not waterproof. INSULATION: Synthetic insulation. Removable 6 mm washable recycled felt inner boot. MIDSOLE: 2.5 mm bonded felt frost plug. OUTSOLE: Handcrafted waterproof vulcanized rubber shell with herringbone outsole.