O'Neill Dalton Pant
Here's what other sites are saying:
Set your kid up with the O'Neill Dalton Insulated Pant to keep him fully protected against winter weather. The high-top design seals out invading snow, while full-length polyfill insulation and storm-proof membrane form a barrier against blizzards. Ripstop fabric resists damage, so little brother can still wear 'em once big brother hits a growth spurt.