Sorel Men's Alpha Pac Extreme Snow Boot 100% Polyurethane, Synthetic, Fabric Imported Rubber sole Shaft measures approximately 14" from arch Boot opening measures approximately 18" around Knee-high winter boot in seam-sealed waterproof construction featuring bungee lacing system and reflective safety graphics Built in gaiter with barrel lock closure system Shatter-resistant YKK Shokonloc buckle closure