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Smooth-faced fleece construction delivers lightweight warmth that doesn't add bulk under a shell
Hybrid gym-to-swim design cuts the need for a wardrobe change — one short handles the whole day
Contagrip MA all-terrain outsole
COOL WOOL MATERIAL: Using a special steaming process
The North Face ThermoBall Traction Mule II – Kids' midlayer Smooth-faced fleece construction delivers lightweightWhen kids need something they can grab and go campsite, backyard, or everywhere in between the ThermoBall Traction Mule II is our pick for young outdoor goers. ThermoBall Eco insulation stays warm even when wet, so damp mornings at the trailhead aren't a problem. A full rubber outsole handles slick floors and light trail alike. ThermoBall Eco synthetic insulation mimics down's warmth clusters keeps feet warm even in wet or damp conditions 100%