My daughter only wore these three times but hit a growth spurt so can't wear them anymore! I was a snowboard / ski instructor and I only invest in the best from Burton! here is info from Burton site: The ultimate bib snow pants for kids, featuring Room-to-Grow capabilities plus unstoppable warmth and waterproofing. There's nothing like having a personal force-field against snow and cold covering 70 percent of your body. That's exactly what kids get with the kids' Burton Skylar Bib Pants. DRYRIDE fabric keeps the interior dry, while a versatile 60 grams of Thermacore insulation throughout provides crucial warmth. Add Burton's Room-to-Grow system, and you've got a pants that's ready to play for years to come.