ECCO. 831804-01543. TRACK 25 PRIMALOFT SHOE. TARMAC. The rugged ECCO Sport Track 25 GORE-TEX Primaloft Shoe features handsome styling 200g of insulation for warmth in cold weather and ultra-durable Yak leather uppers. GORE-TEX waterproof and breathable membrane ensures dry and comfortable feet in wet-weather conditions. Lace-up closure for a secure fit. Warm-lined with revolutionary Primaloft 200g microfiber insulation.