Merrell Chameleon 5 Mid Ventilator GORE-TEX Waterproof Trail Walking Boots GORE-TEX Performance Comfort Footwear Lining - Provides maximum waterproof protection from the elements Suede Leather and Mesh Upper - For optimum comfort and breathability. Bellows Tongue - Keeps the debris out. External Heel Stability Arm - Helps provide stability on rough and uneven terrain. Protective Rubber Toecap - Provides reinforced durability and protection.