Kilpi ULTRA-U socks offer climate comfort to cyclists, runners or other active athletes thanks to the elastane knit, synthetic fibers and seamless construction. The thin, breathable material is ideal for strenuous sporting activities in summer or spring. Carefully placed functional zones provide the necessary support and comfort. The wide elasticated top edge does not compress or impede blood circulation. The fastening hem around the ankle stabilizes the position of the sock. The heel, toe and metatarsal area are reinforced with an abrasion resistant double knit texture. The height of the sock is above the ankle.