Radon Drystar® Boots - Black - US 4 / EU 37 Radon Drystar® Boots Main upper is made of advanced microfibers for durability and long-lasting comfort Incorporates ergonomic toe box construction for improved compatibility with the motorcycle controls and a superior, wide-ranging foot profile for superior fit and comfort Internal heel counter and toe box for enhanced structural rigidity TPU shin plate and shift pad offer support and resistance to impacts TPR design on lateral toe gives more flexibility and resistance against abrasion Drystar® membrane layer between boot upper and inner lining Three adjustable lateral hook-and-loop straps for secure boot closure and a personalized fit Straps feature TPU pull tips for ease of use and durability Internal toe box and heel counter protection layered under the boot upper for durability, improved feel and performance Comfortable and durable technical textile collar lining Dual-density ankle protectors are backed with foam inner padding for protection on both ankle sides High-modulus midsole follows the shape of the foot and incorporates a structured shank reinforcement Innovative, weight-saving laminated technology is utilized on the shin plate for a lightweight yet strong guard against impacts Removable anatomical footbed features EVA foam and textile construction for comfort and support Rear and lateral reflective inserts for improved visibility Vulcanized compound boot sole