RE-TEX® TECHNOLOGY BOA® DUAL-ZONE LACING SYSTEM 600 GRAMS OF 3M™ THINSULATE™ INSULATION INSULATION INSIDE GORE-TEX® MEMBRANE ENSURING A DRY THERMAL LAYER EXTREMELY DURABLE/AGGRESSIVE SOLE PLUSH MOISTURE-WICKING LINER MATERIALS COMFORTABLE YET STIFF/DURABLE SOLE INTERNAL CUSHIONING LOWER "D" RING POSITION TO HOLD CUFF DOWN REMOVABLE MOISTURE-WICKING ORTHOLITE® INSOLE ANKLE CUTOUT PROMOTES FORWARD FLEX USE OF A TECHNICAL SOCK IS REQUIRED TO ENSURE GORE-TEX® FOOTWEAR TOP PERFORMANCE HALF SIZE FIT CREATED WITH INCLUDED INSOLE INSERT