The North Face ThermoBall Pull-On Waterproof Boots combine lightweight ThermoBall insulation with a waterproof DryVent membrane to keep feet warm and dry in wet conditions. Model: NF0A5LXJ — designer ID: TNFA5005117179. Key attributes: Black | PET ripstop | Waterproof (DryVent™ membrane) | ThermoBall™ insulation for warmth even when damp | Easy on/off pull-on design | Low-pile fleece collar lining for comfort | Rubber outsole for traction | Pull-on boot silhouette with webbing pull loops | Adjustable collar bungee | Synthetic mudguard | Dimensions & fit: Approx weight (½ pair): 10.58 oz (300 g) | Sizes 1–7 (whole sizes) | Composition & care: Upper: PET ripstop (100%) | Insulation: ThermoBall™ polyester (100%) | Lining: Low-pile fleece | Outsole: Rubber