The Ghost 18 GTX takes the legendary reliability of the standard Ghost 18 and adds a weather-shielding barrier, making it the go-to choice for runners who refuse to let rain, slush, or mud disrupt their training schedule. It retains the same "Goldilocks" balanced cushioning and smooth ride as the base model but wraps the upper in a GORE-TEX Invisible Fit™ membrane. This creates a waterproof, windproof shield that feels just like a regular running shoe—without the stiffness or bulk typically associated with waterproof footwear. Features: • GORE-TEX Invisible Fit™: Unlike traditional waterproof liners that can feel like a heavy sock, this membrane is bonded directly to the upper mesh. It keeps water out while maintaining a flexible, breathable, and lightweight fit. • Balanced "Daily Driver" Cushioning: Features the same signature foam blend as the standard Ghost 18, providing a smooth, responsive landing that protects your joints on hard, wet pavement. • Trail-Ready Traction: The RoadTack rubber outsole is optimized for wet surfaces, featuring a lug pattern designed to provide confident grip on slick sidewalks and light, muddy paths. • Weather-Proof Protection: The gusseted tongue construction prevents debris, water, and road grit from working their way into the shoe, keeping your feet dry from the inside out. • Best For: Rainy-day road runs, winter training, and multi-surface commuting in unpredictable weather. • Specs: Slightly heavier than the non-waterproof version due to the membrane (typically +0.3 to 0.5 oz), while maintaining the versatile 10mm drop.